Sejuani: Fury of the North

Sejuani is a Jungle champion released on January 17, 2012. Classified as a Vanguard (legacy: Tank, Fighter), she plays primarily in the Jungle and occasionally Support. She is Melee with 150 attack range, adaptive type Magic, and uses Mana. Base MS: 340.

Last changed patch V25.24. Store price: 225 BE / 260 RP – among the cheapest champions in the game. Sejuani is explicitly designed as a beginner-friendly tank jungler with high CC contribution per game, clear teamfight impact, and a forgiving kit that rewards positioning awareness more than mechanical precision. Her Frost stack system creates ally coordination opportunities and her Glacial Prison ultimate is one of the longest-range hard CC tools in the jungle role.

📊 Base Statistics

💡 Key Note: Sejuani’s base armor (34 → 141.17) is among the highest in the game for a jungler. Combined with Frost Armor’s passive resistance buff, she has one of the best raw durability floors at every stage of the game. Her 630 HP base also allows early tank item investment without feeling fragile in initial clears. HP per level scaling (2871 at level 20) supports the max-health damage components of Permafrost and Winter’s Wrath.

Passive: Fury of the North

INNATE – ICEBREAKER: Enemies stunned by Sejuani are marked Frozen for the disable’s duration. Sejuani’s next basic attack or ability against a Frozen enemy will consume the mark to deal bonus magic damage equal to 10% of their maximum health, capped at 250 against epic monsters.

INNATE – FROST ARMOR: Sejuani gains Frost Armor, which lingers for 3 seconds after taking damage from enemy champions, turrets, or large monsters. She restores it after 12 – 5.29 (based on level) seconds without taking damage from them.

FROST ARMOR BONUSES:

• Slow immunity
• Cripple immunity
• 10 (+75% bonus armor) bonus armor
• 10 (+75% bonus magic resistance) bonus magic resistance

💡 Icebreaker Synergy with Glacial Prison: Every champion stunned by Glacial Prison (R) is immediately Frozen by Icebreaker. The first ability or auto-attack Sejuani uses against each stunned target deals 10% of their max HP as bonus magic damage. Against a full enemy team caught in a long-range R, Sejuani can proc Icebreaker on all 5 enemies in the next 1–1.5 seconds – a significant chunk of total damage that scales directly with the enemy team’s HP totals. Building HP on the enemy team is not a counter to Sejuani – it amplifies her damage.

⚠️ Frost Armor Combat Note: Frost Armor is not permanently active – it requires taking damage first and expires 3 seconds after the last qualifying hit. In jungle clearing, large monsters trigger it. In combat, the first enemy hit activates it. The slow and cripple immunity becomes critical when fighting champions whose primary peel tool is a slow (Ashe, Nunu, Kindred). Knowing Frost Armor is active or not determines whether Sejuani can close distance against kite-heavy compositions.

Q: Arctic Assault

Cost: 60/65/70/75/80 Mana  |  CD: 18/16.5/15/13.5/12 sec  |  Cast Time: None  |  Target Range: 650  |  Collision Radius: 75  |  Speed: 1000

ACTIVE: Bristle (Sejuani’s boar) dashes to the target location until he collides with an enemy champion, dealing magic damage to enemies he passes through and knocking them up for 0.5 seconds. Arctic Assault can be cast during her other abilities without cancelling them and vice versa.

💡 Pro Tip – Q + W Simultaneous Cast: Arctic Assault can be cast during Winter’s Wrath without cancelling either ability. The intended engage combo is Q (dash + knock-up) → W activating simultaneously to hit the knocked-up target with both W strikes. This overlap creates a combo window where Sejuani both closes distance and deals W damage in the same 0.75–1 second window, significantly compressing the time-to-CC compared to sequential casting.

⚠️ Dash Collision Note: Arctic Assault stops when it collides with an enemy champion – not at maximum range if no champion is hit. This means Q’s effective distance varies based on enemy positioning. Against a champion standing at the edge of the 650-range, Q stops immediately at impact. Against a champion beyond 650 range, Q travels the full distance and Sejuani lands at the endpoint. Position Q casts to maximize the dash distance for repositioning value when the kill isn’t the immediate priority.

W: Winter’s Wrath

Cost: 60 Mana  |  CD: 9/8/7/6/5 sec  |  Cast Time: 1 sec  |  Target Range: 600  |  Width: 150  |  Angle: 70°

FIRST HIT (0.25s into cast): Sejuani swings her flail in a 70° cone dealing physical damage to enemies hit and knocking back minions and monsters (not through terrain).

SECOND HIT (at end of cast time): Sejuani lashes out with her flail in a line in the same direction, dealing physical damage and slowing enemies by 75% for 0.25 seconds. Sejuani can move during Winter’s Wrath’s cast time.

FROSTBRAND PASSIVE (on Permafrost E): Winter’s Wrath and both Sejuani’s and nearby allied melee champions’ basic attacks and on-hit effects apply stacks of Frost to enemy champions, medium or large monsters, and large minions for 5 seconds, refreshing on subsequent applications and stacking up to 4 times. Enemies hit by Permafrost or Glacial Prison’s bola have all of their Frost stacks consumed. Enemy champions cannot be affected by Frost for 8 seconds after having it consumed.

💡 Pro Tip – Max HP Scaling: At rank 5, Winter’s Wrath deals 12% of Sejuani’s own maximum HP across both hits. With 4000 HP at full tank build, this is 480 bonus physical damage from the HP scaling alone, before AP contributes. Building HP is simultaneously survivability and damage amplification on Sejuani – every tank HP item directly increases W’s sustained DPS in extended fights.

⚠️ Frost Stack Generation Note: W applies Frost stacks but does not solo generate the 4 needed for Permafrost in a single cast. Both W hits apply 1 stack each (2 total). Allied melee basic attacks and on-hit effects apply additional stacks. In a 2v2 or teamfight scenario, Frost stacks accumulate faster with ally participation. Solo in the jungle, W → W after the first expires generates stacks over time but requires the 9–5 second cooldown between casts.

E: Permafrost

Cost: 20 Mana  |  CD: 1.5 sec  |  Cast Time: 0.25  |  Target Range: 600  |  Effect Radius: 1100

PASSIVE – FROSTBRAND: (See Winter’s Wrath above) W and allied melee basic attacks apply Frost stacks up to 4 times. Sejuani can cast Permafrost against an enemy with 4 stacks.

ACTIVE: Sejuani hurls a trap at the visible enemy with 4 stacks of Frost closest to the cursor, dealing magic damage, displacing them slightly, and stunning them for 1 second. Permafrost resets Sejuani’s basic attack timer.

💡 Pro Tip – Stack Acceleration with Allies: In a 2v2 bot gank, every ally melee basic attack contributes 1 Frost stack. A Sejuani + Jarvan IV gank where Jarvan auto-attacks the target 3 times generates 3 stacks – Sejuani only needs W to land the 4th. The 1-second Permafrost stun, combined with Icebreaker’s 10% max HP proc, then sets up Glacial Prison or a followup W + auto combo. Coordinating Frost stack generation with engage supports and junglers in the 2v2 is Sejuani’s primary team synergy mechanic.

⚠️ The 8-Second Frost Immunity: After Permafrost or Glacial Prison bola consumes all Frost stacks, the target cannot receive new Frost stacks for 8 full seconds. This prevents back-to-back Permafrost stuns on the same target. In teamfights, use Permafrost on the highest-priority target and rotate to other enemies while the immunity is active. Do not waste W hits and ally attacks on the Frost-immune target immediately after using E.

R: Glacial Prison (Ultimate)

Cost: 100 Mana  |  CD: 120/105/90 sec  |  Cast Time: 0.25  |  Target Range: 1300  |  Effect Radius: 450/450/300  |  Width: 240  |  Speed: 1600

ACTIVE: Sejuani throws an ice bola in the target direction that stops upon hitting an enemy champion, dealing magic damage and stunning them for 1 second.

EMPOWERED (travels 425+ units): If the bola travels at least 425 units, it becomes empowered to detonate upon reaching maximum range or hitting an enemy champion, dealing increased magic damage and stunning for 1.5 seconds instead. For the same duration, a frost storm is created around the location of the detonation that slows enemies within by 30% and grants sight of the area in a smaller radius.

After 2 seconds, the storm shatters to deal the increased magic damage to enemies within and slow them by 80% for 1 second, as well as revealing them and granting sight of the area for 0.5 seconds. The enemy hit by the bola is not affected by the storm’s effects.

💡 Pro Tip – Always Aim for Long Range: The empowered Glacial Prison is not marginally better than the short range version – it’s a fundamentally different ability. 425+ unit distance adds: 0.5 extra stun seconds (50% longer), significantly increased damage, a 30% slow zone for 2 seconds, and an 80% slow shatter. Always attempt to throw R from maximum range possible. The 1300-unit target range allows R to be cast from well outside normal combat distance. In teamfights, position at range before throwing R rather than engaging Q first and then R at short distance.

💡 Storm Shatter Targeting: The frost storm shatter at 2 seconds targets enemies still within the storm radius – not the primary R target (who is already stunned and standing in the storm location). This means R’s total damage to enemies caught in the storm is: 1.5s stun + hit damage + 2 seconds of storm slow + 80% slow shatter + shatter damage. Enemies standing near but not directly hit by the bola take the full storm sequence without the bola’s direct stun – positioning the bola to land near a cluster maximizes the storm’s reach.

🎯 Strategies and Gameplay Tips

Early Game (Levels 1–6)

• Standard Jungle Path: Sejuani clears efficiently but not quickly. Standard 3-camp clear (red buff side or blue side) into first gank at level 3. Frost Armor activates on every large monster hit, making her natural jungler without taking meaningful damage through the clear. Arctic Assault (Q) as level 1 provides the charge mobility needed for immediate gank threat at level 2–3.
• Gank Pattern: Standard gank entry is Q (dash + knock-up) → W (both hits during dash = Frost stacks) → allied follow-up autos for remaining stacks → E (1-second stun once 4 stacks) → auto during Icebreaker Frozen window for 10% max HP bonus magic damage. This sequence applies up to 3 stuns (Q knock-up, E stun, then R if available) and the Icebreaker proc.
• Level 6 R Priority: The first Glacial Prison at level 6 should target the highest-CC-value gank opportunity – typically bot lane where the 1300-range long bola can be launched from the river while the enemy is unaware. The empowered storm’s 2-second slow zone after the stun gives the laner time to follow up even if their own CC is on cooldown.

Mid Game (Levels 7–13)

• Frost Stack Coordination with Allies: In skirmishes with allies, communicate the Permafrost setup. A melee ally auto-attacking the same target 3–4 times while Sejuani uses W generates 4 stacks in under 2 seconds. This enables a reliable 1-second stun without committing Glacial Prison. In objective fights around Dragon, this stack setup → Permafrost combo denies Dragon steals and isolates priority targets.
• Glacial Prison Engage at Range: The most impactful mid-game Sejuani play is opening teamfights with a long-range Glacial Prison that stuns the enemy ADC or support before the fight even begins. Position at 1100–1300 range in a flanking position, wait for the carry to misposition slightly out of their team’s protection, then R → Q → W sequence into the stunned target.
• Frost Armor in Objective Fights: Frost Armor’s slow and cripple immunity is especially valuable when contesting Smite on Dragon or Baron with the enemy jungler threatening to peel Sejuani off the objective. The immunity window allows her to continue auto-attacking through Nunu W, Ashe slow, or any other kite ability that would normally interrupt objective channeling.

Late Game (Level 14+)

• Icebreaker Against HP-Stacking Enemies: The Icebreaker 10% max HP damage per stunned target means enemy tank builds directly amplify Sejuani’s damage output. Against a 5000 HP Ornn or Malphite, a single Icebreaker proc deals 500 magic damage. Against a full enemy team caught in Glacial Prison with all champions stunned, Sejuani can proc Icebreaker on each within 2 seconds for significant total burst damage against high-HP targets.
• Glacial Prison as Peel: At rank 3, Glacial Prison’s 90-second cooldown is short enough to use defensively when the team is being dived. Throwing R at an assassin mid-dive (Zed, Rengar, Kha’Zix) with at least 425 units of travel stunts the dive completely with a 1.5-second stun + storm slow. The defensive R usage against a single diver is often more impactful than an aggressive R engage.
• W Max HP Damage in Late Fights: At rank 5 W with 5000 HP, both W hits deal 12% max HP combined = 600 physical damage before AP scaling, every 5 seconds. Against a team that builds HP to survive Sejuani’s CC, this sustained damage adds up over multiple W casts in a 15-second teamfight. Auto-attack between W casts to consume Icebreaker procs on stunned targets simultaneously.

⚔️ Core Combo Guide

1. Standard Gank Combo: Q (dash into knock-up) → W (first + second hit during dash = 2 Frost stacks) → ally melee attacks (2+ more stacks) → E Permafrost (4-stack stun, 1 second) → auto during Frozen (Icebreaker 10% max HP) → R if target survives
2. Long-Range Teamfight Opener: Position at 1000–1300 range → R (long bola = 1.5s stun + storm) → Q into the stunned cluster → W (both hits, Frost stacks on all targets) → E on priority target with 4 stacks → auto Icebreaker proc on stunned target
3. Solo Jungle Frost Generation: W (2 stacks) → auto (3 stacks, Frost Armor active from monster hit) → W again after CD (4th stack) → E stun on large monster for Icebreaker proc
4. Defensive Peel Combo: Assassin dives ally → R (long bola if possible, 425+ units for 1.5s stun) → Q into diver → W both hits (Frost stacks) → E Permafrost stun once 4 stacks assembled → ally cleanup

❌ Common Mistakes and How to Avoid Them

• Throwing Short-Range Glacial Prison: R at under 425 units deals less damage, stuns for 1 second instead of 1.5, and generates no storm. The most common Sejuani mistake is Q-ing into a fight and then R-ing at point-blank range. Always commit to a long-range R first, then Q into the stunned target. The play order is R → Q, not Q → R.
• Permafrost on Wrong Target: E targets the enemy with 4 Frost stacks closest to Sejuani’s cursor. In teamfights with multiple Frost-stacked targets, clicking in the wrong direction auto-targets the minion-priority monster or a non-priority champion. Consciously move the cursor toward the intended target before pressing E.
• Wasting W Hits on Frost-Immune Targets: The 8-second post-Permafrost immunity makes W hits and ally autos on that target worthless for stack generation. Immediately after using E on a target, rotate W and auto-attacks to a different enemy to begin stack generation on a fresh target.
• Ignoring Icebreaker After Permafrost: After E stuns a target, they are Frozen by Icebreaker for the stun duration. One ability or auto immediately during the stun window deals 10% of their max HP. Failing to follow up E with any ability or auto wastes the most impactful passive proc in the kit.
• Not Using Q During W: Arctic Assault can be cast during Winter’s Wrath without cancelling either ability. Many Sejuani players wait for W to complete before pressing Q, losing the simultaneous hit window. Activate W → immediately Q while W is animating to compress the damage and CC into a shorter window.

⚙️ Recommended Build and Itemization

Core Items

• Sunfire Aegis: Immolate passive deals magic damage per second to nearby enemies. In Sejuani’s extended teamfight pattern (multiple W casts, sustained proximity), Sunfire ticks during every second of combat. The HP amplifies both Sejuani’s survivability and W’s max-health damage scaling simultaneously.
• Warmog’s Armor: The passive HP regeneration outside of combat keeps Sejuani at full HP between ganks and objective fights. The massive HP total (600+ HP from Warmog’s alone) directly increases W’s max-health damage by 72 bonus physical damage per cast (600 × 12%). Every HP item is a damage item on Sejuani.
• Thornmail: Against healing-heavy compositions (Yuumi, Soraka, Aatrox), Thornmail’s Grievous Wounds on any damage applied – including Frost Armor’s incidental damage – reduces healing across the entire frontline fight. Especially valuable against ADCs who life steal through Sejuani’s W damage.

Situational Items

• Locket of the Iron Solari: Team-wide shield during engage sequences. Casting Locket’s active during the Q → W → E combo window protects the following allied carry from the burst damage that comes after Sejuani’s CC chain. Pairs well with compositions where allies are diving alongside Sejuani’s initiation.
• Force of Nature: Magic resistance stacking against AP-heavy compositions. Sejuani’s naturally low MR (32 base) is a vulnerability against burst mages. FoN’s stacking MR on being hit and the passive MR amplification converts every AP mage’s poke into building Sejuani’s own resistance over the fight.
• Jak’Sho, The Protean: Voidborn Resilience stacks armor and MR per second in combat. Sejuani’s sustained in-fight presence (multiple W casts, extended proximity) maximizes Jak’Sho stacks faster than most tanks. Converts prolonged fights into Sejuani’s strongest scenario.

⚔️ Counter Picks & Matchups

✅ Sejuani Counters

1. Amumu – No meaningful counter to Glacial Prison initiating from long range. Amumu’s own CC depends on landing Bandage Toss at relatively short range. Sejuani’s Frost Armor immunity to slows prevents Amumu’s kit from disrupting her engage sequence.

2. Zac – Similar role but Sejuani’s engage range exceeds Zac’s practical initiation distance. Glacial Prison’s 1300-range bola creates a stun before Zac can reach the backline. Permafrost stun timing interrupts Zac’s Cell Division (R) during combat.

3. Warwick – No ranged CC to peel Sejuani’s engage or interrupt her after Arctic Assault lands. Warwick’s Blood Hunt tracking doesn’t counter Frost Armor’s slow immunity during the approach. Glacial Prison mid-Infinite Duress (R) suppression interrupts the entire channel on a successful long-range bola hit.

❌ Sejuani is Countered By

1. Trundle – Subjugate (R) drains Sejuani’s resistances directly, converting her own armor and MR into Trundle’s bonus stats. The longer the fight lasts, the more Sejuani’s tank stats become Trundle’s. In a 1v1 extended duel, Trundle becomes effectively as tanky as Sejuani while Sejuani loses her resistance pool.

2. Rammus – Frenzying Taunt (W) forces Sejuani to auto-attack Rammus’s Spiked Shell – reflecting her own AD back as damage. In fights where Sejuani needs to auto for Icebreaker procs, Taunt converts her into her own damage source against herself. Rammus’s armor also completely negates Sejuani’s physical damage from W.

3. Udyr – Raw 1v1 dueling power exceeds Sejuani’s damage output in a straight fight. Udyr’s sustained attack speed during Phoenix or Bear stance prevents Sejuani from maintaining 4 Frost stacks the meaningful way – Udyr simply doesn’t stand still long enough. Phoenix Stance’s DOT also chips through Frost Armor’s resistance buff faster than Sejuani’s HP can sustain in extended isolated duels.

FAQ

Q: How do Frost stacks generate?

A: Winter’s Wrath (W) hits apply 1 Frost stack each hit (max 2 per W cast). Sejuani’s own basic attacks apply 1 stack. Nearby allied melee champions’ basic attacks and on-hit effects apply 1 stack each. 4 stacks are required for Permafrost. Stacks last 5 seconds and refresh on new applications. There is an 8-second immunity after Permafrost or Glacial Prison bola consumes all stacks.

Q: Does short-range Glacial Prison work in an emergency?

A: It functions – the target is stunned for 1 second and takes base damage. But the difference between short range and long range is substantial: 50% longer stun, more than doubled damage at rank 3, plus the frost storm with 30% and 80% slow zones. When possible, always engage from long range and then Q in. Short-range R should only be used when the target is about to escape and there’s no time to reposition.

Q: When is Frost Armor active?

A: Frost Armor activates 3 seconds after taking damage from an enemy champion, turret, or large monster. In jungle clearing, it’s effectively permanent since large monsters continuously hit Sejuani. In teamfights, the first hit activates it for 3 seconds. Between fights in the jungle, it restores after 12–5.29 seconds (level-based) without qualifying damage taken.

Q: Why does the enemy building HP not counter Sejuani?

A: Icebreaker deals 10% of the target’s maximum health as bonus magic damage. A target who builds 500 more HP to survive Sejuani’s damage has also given Sejuani 50 more bonus magic damage per Icebreaker proc. Similarly, W’s max-health scaling means every HP item the enemy builds slightly increases Sejuani’s own W damage. HP alone is not a counter – magic resistance is the correct counter to Icebreaker.

Q: Is Sejuani good for beginners?

A: Yes – explicitly one of the most beginner-accessible junglers. Frost Armor provides passive durability without decision-making. Arctic Assault is a simple charge. Glacial Prison has clear visual feedback for long vs. short range. Permafrost has a 1.5-second cooldown, meaning mistiming one cast doesn’t cost a teamfight. The primary skill to develop is long-range Glacial Prison aim – everything else in the kit is forgiving.