Randuin’s Omen

What is Randuin’s Omen? đŸ›Ąïž

Randuin’s Omen is a legendary Tank item in League of Legends, categorized under Tank, Health & Regeneration, and Armor. It is the primary anti-critical-strike tank item in the game — specifically designed to counter marksmen and crit-building champions through two mechanisms: the HUMILITY active that forces grouped enemies into a 70% slow, and the RESILIENCE passive that reduces all incoming critical strike damage by 30%.

The RESILIENCE passive is Randuin’s Omen’s defining identity. Against a standard crit ADC dealing 200% AD on crits, RESILIENCE reduces that to 140% AD per critical strike — a 30% multiplicative reduction. Over a teamfight where an ADC fires multiple crits into the tank, this reduction accumulates into meaningful effective HP. No other single item in the game provides direct critical strike damage mitigation at this level.

At 2,700 Gold, it is competitively priced for a tank item. Sell price: 1,890 Gold. ID: 3143. Available on SR 5v5, ARAM, Nexus Blitz, and Arena.

📊 Base Statistics

StatisticValue
Total Cost2,700 Gold
Combine Cost800 Gold
Sell Price1,890 Gold
Armor+75
Health+350 HP
Item ID3143
AvailabilitySR 5v5, ARAM, Nexus Blitz, Arena

🔹 Recipe & Components

Randuin’s Omen builds from a pure armor foundation and an HP component:

ComponentCostNotes
Warden’s Mail1,000 Gold (+400 combine)2x Cloth Armor — pure armor foundation; slow on being hit passive
Cloth Armor300 GoldPart of Warden’s Mail — first armor input
Cloth Armor300 GoldPart of Warden’s Mail — second armor input
Giant’s Belt900 Gold (+500 combine)Ruby Crystal — HP foundation
Ruby Crystal400 GoldPart of Giant’s Belt — HP input
Combine Cost800 GoldFinal assembly
Total2,700 GoldComplete Randuin’s Omen
💡 Warden’s Mail — Strong Armor Mid-Item vs Basic Attack DealersWarden’s Mail (1,000g) provides pure armor as a first-back or mid-item purchase.It also has its own passive (Cold Steel on SR): attacks against you reduce attacker’s attack speed.Against heavy basic attack compositions (Fiora, Tryndamere, marksmen), Warden’s Mail early provides meaningful attack speed slowdown before Randuin’s Omen completes.Giant’s Belt (900g) provides the HP foundation — buy whichever is needed first based on the incoming damage type.

⚡ Active Mechanic: HUMILITY

HUMILITY unleashes a shockwave in a 500 range area around the caster, slowing all nearby enemies by 70% for 2 seconds. Cooldown: 90 seconds.

HUMILITY — Complete Mechanics Reference

MechanicBehavior
Slow amount70% for 2 seconds
Area500 range around the caster
Cooldown90 seconds
TargetingAuto-targeted — fires automatically at nearby enemies in range
Spell shield interactionHUMILITY breaks spell shields on cast — but STILL applies the slow (bug)
Combat statusHUMILITY activates combat status despite dealing NO damage
StealthHUMILITY’s cast BREAKS stealth
Cast timeNo cast time — instant activation
MissilesShoots individual missiles to affected targets — these are NOT considered projectiles
DamageNO damage dealt — pure slow only
⚠ HUMILITY Spell Shield Bug — Important InteractionHUMILITY breaks spell shields (Banshee’s Veil, Edge of Night, Sivir E) on cast.However, it STILL applies the 70% slow to the spell-shielded target regardless — this is a documented bug.Practically: Randuin’s Omen HUMILITY will consume a Banshee’s Veil AND still slow the target.This makes HUMILITY functionally unblockable for its slow effect — spell shields cannot prevent the slow.The bug has persisted through multiple patches — treat HUMILITY as always landing the slow regardless of spell shield status.
💡 HUMILITY — 70% Slow Is the Strongest Slow in the Game from a Single Source70% slow reduces a 340 base movement speed champion to 102 effective movement speed for 2 seconds.No standard mobility ability can escape a 70% slow in 2 seconds — even 550 MS champions are slowed to 165 MS.In grouped teamfights within 500 range, all 5 enemies simultaneously hit with HUMILITY creates a 2-second window where the entire enemy team is effectively immobilized.Combining HUMILITY with zone control abilities (Orianna R, Kennen R, Amumu R) during the 2-second slow window is one of the most decisive engage patterns in the game.

đŸ›Ąïž Passive Mechanic: RESILIENCE

RESILIENCE reduces incoming damage from critical strikes by 30%. This reduction is applied multiplicatively, not additively.

RESILIENCE — How the 30% Reduction Actually Works

Against a standard crit at 200% AD: RESILIENCE applies a 0.70 multiplier (1 – 0.30 = 0.70), reducing the hit to 140% of the enemy’s AD instead of 200%. This is a direct 60 AD reduction in damage per crit at the 200% crit threshold.

Crit ScenarioWithout RESILIENCEWith RESILIENCEEffective Damage Reduction
Standard crit (200% AD)200% AD140% AD-60 AD per crit (-30%)
Infinity Edge crit (220% AD)220% AD154% AD-66 AD per crit (-30%)
Ashe double-slow crit (240% AD)240% AD168% AD-72 AD per crit (-30%)
Non-crit hit100% AD100% ADNo reduction — RESILIENCE only affects crits

RESILIENCE — Ability Crit Interactions

RESILIENCE’s critical strike damage reduction also affects abilities that critically strike, but only under specific conditions:

  • Applies to: abilities treated like a basic attack or that deal modified damage — examples include Shadowflame-empowered crits on ability damage that’s categorized as modified damage
  • Does NOT apply to: abilities that deal bonus damage — critical strikes that add bonus damage on top of normal damage rather than modifying the base damage amount
  • Multiplicative application: the 30% reduction is applied multiplicatively — if multiple crit damage reduction sources exist, they multiply together rather than adding
📊 RESILIENCE Value Calculation — How Much EHP Does It Add?Against a 300 AD ADC with 100% crit chance: every auto would deal 600 damage without RESILIENCE.With RESILIENCE: 600 × 0.70 = 420 damage per crit — saving 180 damage per auto attack.In a 5-second sustained fight with 3 crits per second (Runaan’s multi-bolts): 9 crits total.Without RESILIENCE: 9 × 600 = 5,400 damage. With RESILIENCE: 9 × 420 = 3,780 damage.RESILIENCE prevented 1,620 damage in 5 seconds vs a full-crit ADC — substantially more than any single HP item provides in effective HP.

đŸŸïž Arena Mode — Map-Specific Differences

StatSR 5v5 / ARAM / Nexus BlitzArena
Health+350 HP+300 HP
Armor+75+75 (unchanged)
HUMILITY slow70% for 2 seconds70% for 2 seconds (unchanged)
RESILIENCE30% crit damage reduction30% crit damage reduction (unchanged)

Arena only reduces the HP stat from +350 to +300 — all core mechanics (armor value, HUMILITY slow, RESILIENCE reduction) remain identical. The HP reduction is the only difference.

🎯 Best Champions for Randuin’s Omen

Randuin’s Omen is strongest on tanks and frontliners who engage into grouped enemies and need to survive burst from crit-building marksmen. The dual function — HUMILITY for groupfight control and RESILIENCE for crit damage mitigation — rewards champions who initiate or occupy the frontline where both effects are simultaneously relevant.

✅ Ideal Picks

  • Malphite — Unstoppable Force (R) groups enemies perfectly for HUMILITY follow-up, and his natural armor-stacking identity compounds RESILIENCE’s mitigation. HUMILITY during his R initiation window keeps the stunned cluster slowed even after the stun ends. His frontline role means he absorbs crit damage regularly — RESILIENCE is always active value.
  • Amumu — His Curse of the Sad Mummy (R) AoE stun and Bandage Toss (Q) engagement keep him in the middle of grouped enemies where HUMILITY is maximally effective. HUMILITY during Amumu’s R chains the crowd control window into an extended 2-second slow period after the stun expires.
  • Leona — Her dive engages through Solar Flare (R) and Eclipse (W) + Zenith Blade (E) create sustained melee proximity with the enemy backline. HUMILITY catches ADCs at close range who would otherwise flash away after her initial stun. RESILIENCE reduces their retaliatory crits after she dives.
  • Shen — His engagement style through Shadow Dash (E) creates consistent close-range combat. HUMILITY’s 500 range AoE catches multiple enemies during his taunt, and the slow continues after the taunt expires for extended CC chaining.
  • Ornn — His teamfight identity centers on grouped combats where HUMILITY’s AoE slow amplifies his Bellows Breath (E) and Volcanic Rupture (Q) zone control. His passive HP and armor scaling makes both RESILIENCE and HUMILITY more impactful as the game progresses.
  • Cho’Gath — His large body occupies the frontline and benefits from both armor and HP. HUMILITY during Rupture (Q) engagement creates a multi-layered CC pattern. RESILIENCE is particularly impactful on Cho’Gath’s inflated HP pool — 30% less crit damage against his 5,000-8,000 HP total is substantial effective HP gain.

❌ Suboptimal Picks

  • AP mages and damage dealers: 75 armor and 350 HP provide survivability but no offensive value. AP damage dealers building defensively typically want items that also provide AP (Zhonya’s Hourglass, Shadowflame in the opposite direction). Randuin’s Omen is a pure tank item — building it on non-tanks delays offensive output.
  • Tanks in compositions without crit-heavy enemies: RESILIENCE provides zero value if enemies aren’t building critical strike chance. Against full AP compositions or AD champions who don’t build crit (Darius, Garen, Renekton), Randuin’s Omen’s passive is entirely inactive. Frozen Heart (for ability haste reduction and mana) or Thornmail (for anti-heal) are better alternatives against non-crit AD compositions.
  • Ranged tanks who don’t engage into enemy backlines: HUMILITY requires the tank to be within 500 range of multiple enemies simultaneously — typically a melee engagement range. Ranged tanks who stay at distance don’t maximize the AoE slow coverage.

⚙ Recommended Build Paths

Anti-ADC Frontline Tank (Malphite / Amumu)

  1. Sunfire Aegis — First item — IMMOLATE passive DoT; HP + armor foundation that compounds with Randuin’s resistances
  2. Randuin’s Omen — Second item — RESILIENCE passive activated immediately; HUMILITY for initiation follow-up after R
  3. Thornmail — Third item — GRIEVOUS WOUNDS application against life-steal ADCs; armor stacking reduces per-crit damage further
  4. Frozen Heart — Fourth item — mana + armor + COLD STEEL aura slowing attacker attack speed
  5. Gargoyle Stoneplate / Force of Nature — Fifth item — omni-tank vs mixed damage or pure MR vs heavy AP follow-up

Engage Tank with CC Chaining (Leona / Shen / Ornn)

  1. Locket of the Iron Solari — First item — IRON AEGIS team shield for engage windows
  2. Randuin’s Omen — Second item — HUMILITY activated after initial CC for extended slow window; RESILIENCE vs backline crits during close-range combat
  3. Dead Man’s Plate — Third item — bonus MS for gap-closing approaches; CRUSHING BLOW empowered first attack after movement
  4. Thornmail — Fourth item — anti-heal vs enemy healing ADCs or drain-tanks
  5. Warmog’s Armor — Fifth item — regeneration passive for between-fight HP recovery; HP scaling amplifies RESILIENCE effective HP math
💡 Pro Tip — HUMILITY Combo Patterns with Ultimate AbilitiesMalphite R → HUMILITY: group with Unstoppable Force, then HUMILITY immediately — enemies stunned then slowed for 2s after stun expires.Amumu R → HUMILITY: same pattern — 1.5s stun into 2s slow = 3.5s of consecutive CC on the entire groupfight cluster.Leona R → HUMILITY: Solar Flare roots/stuns center then HUMILITY at melee range catches anyone in the 500 radius.HUMILITY has NO cast time — it can be activated during the recovery frames of any ability immediately after the R lands.The 90-second cooldown means HUMILITY is available for major objectives (Baron/Dragon) once per fight cycle.

🔄 Similar Items & Alternatives

ItemArmorHPKey Mechanicvs. Randuin’s Omen
Dead Man’s Plate+300 HP+50 armorCRUSHING BLOW on fast movement + MSMobility approach vs anti-crit passivity
Frozen Heart+90 armor+400 manaCOLD STEEL -20% AS auraAura attack speed reduction vs burst crit reduction
Iceborn Gauntlet450 HP+50 armorSPELLBLADE slow zoneAoE slow field on spell cast vs active AoE slow
Sunfire Aegis+450 HP+30 armorIMMOLATE DoT auraSustained AoE damage vs crit mitigation + slow active
Thornmail+175 HP+80 armorGRIEVOUS WOUNDS + return damageAnti-heal/sustain vs anti-crit utility
Unending Despair+200 HP+55 armorAoE HP drain passiveSustain drain vs burst crit mitigation
StridebreakerNoneNoneSlowing dash activeAD fighter gap-closer vs pure tank slow AoE

❌ Common Mistakes & How to Avoid Them

  • Building it against non-crit compositions: RESILIENCE is zero-value passive against enemies who don’t build crit. Check the enemy item builds by minute 10-15 — if no one is building crit (Infinity Edge, Navori, crit runes), Frozen Heart or Thornmail provide better value from the armor item slot. Randuin’s Omen is specifically an anti-crit item.
  • Using HUMILITY reactively after taking damage: HUMILITY’s 70% slow is a catch tool — not a damage mitigation tool. Activating it after already being bursted provides less value than using it to catch enemies during or immediately before the engage. The 2-second slow window is most valuable when enemies are attempting to escape the fight, not while they’re already in range dealing damage.
  • Not factoring the spell shield bug into gameplay: HUMILITY breaks spell shields AND still applies the slow — this is documented but surprising. Players who avoid activating HUMILITY against Banshee’s Veil users are missing free slow value. HUMILITY the target regardless of their spell shield status — the slow lands either way.
  • Expecting RESILIENCE to reduce all incoming crit damage uniformly: RESILIENCE does NOT reduce bonus damage crits — only crits that function as modified basic attack damage. Abilities that ‘deal bonus damage on crit’ (rather than ‘deal modified damage on crit’) bypass RESILIENCE. Check whether enemy champion abilities are modified-damage or bonus-damage crits to know whether RESILIENCE applies.
  • Forgetting HUMILITY activates combat status: HUMILITY enters combat status despite dealing no damage. This matters for champions with out-of-combat regeneration (Warmog’s, Soraka, base regen) — activating HUMILITY even without hitting an enemy will delay the out-of-combat timer. Avoid accidental HUMILITY usage near enemy ward vision if trying to maintain out-of-combat regen.

✅ Best Practices

  • Buy specifically against crit ADC compositions: check enemy builds by minute 12 — if 2+ enemies are building Infinity Edge, RFC, or Navori, Randuin’s Omen delivers compounding RESILIENCE value throughout the game
  • Chain HUMILITY immediately after initiation ults: Malphite R, Amumu R, Leona R — use HUMILITY with no cast time the moment the CC lands; converts 1.5-2s stun into 3.5-4s total CC duration on the grouped cluster
  • HUMILITY breaks spell shields but still slows — activate freely against Banshee’s Veil users without concern
  • Combine with Thornmail for anti-ADC complete: Thornmail applies GRIEVOUS WOUNDS against life steal ADCs while Randuin’s reduces their crit damage — together they address both the sustain and the burst damage from the enemy carry
  • Use HUMILITY before Baron/Dragon teamfights: on a 90-second CD it aligns with objective spawn timers; activating in the pit entrance catches the entire enemy team attempting to contest
  • Ornn, Cho’Gath, and HP-stacking tanks extract increasing RESILIENCE value as HP grows — the reduction percentage is constant but the prevented damage represents more total EHP at higher HP pools

FAQ

Q: Does RESILIENCE reduce damage from all crits or only basic attack crits?

A: A: RESILIENCE reduces incoming damage from critical strikes broadly — including abilities that critically strike if they are treated like a basic attack or deal modified damage. However, it does NOT apply to abilities that deal bonus damage as their crit mechanic (where the critical strike adds a separate bonus damage portion on top of normal damage). The distinction is modified damage vs bonus damage — checking whether an ability’s crit mechanic modifies the base damage or adds bonus damage on top determines whether RESILIENCE applies.

Q: Does HUMILITY deal damage when it lands?

A: A: No. HUMILITY deals zero damage — it is a pure slow. It does however activate combat status despite not dealing damage, and it breaks stealth on cast. The missiles it shoots to affected targets are visual indicators only and are not considered projectiles.

Q: Can enemies spell shield the HUMILITY slow?

A: A: This is a documented bug: HUMILITY breaks spell shields on cast but still applies the 70% slow regardless. Banshee’s Veil, Edge of Night, and Sivir’s Spell Shield are consumed by HUMILITY, but the slow is applied to the target anyway. In practice, HUMILITY’s slow is functionally unblockable.

Q: Is Randuin’s Omen worth buying if only one enemy builds crit?

A: A: It depends on the value of HUMILITY vs armor alternatives. If the single crit builder is the primary threat (enemy ADC with Infinity Edge), RESILIENCE still provides meaningful crit mitigation on every right-click they land. If the enemy ADC is far ahead, Randuin’s RESILIENCE may be more valuable than Frozen Heart’s attack speed aura. Against a single crit builder in an otherwise AP-heavy composition, consider Frozen Heart or Sunfire Aegis instead — those provide more value when RESILIENCE has limited targets.

Q: How does the 30% multiplicative reduction interact with other crit reduction sources?

A: A: Multiplicative application means each reduction source multiplies the remaining damage rather than adding to the reduction percentage. If two sources each reduce crit damage by 30%, the combined effect is: 100% × 0.70 × 0.70 = 49% of original damage (51% total reduction). This is less than an additive 60% reduction — multiple crit damage reduction sources don’t stack linearly.

Q: What is the maximum slow from HUMILITY in a real fight scenario?

A: A: HUMILITY’s 70% slow for 2 seconds is a fixed value — it cannot be amplified beyond 70%. However, it chains with champion CC: Malphite R (1s stun) into immediate HUMILITY = 1 second of stun followed by 2 seconds of 70% slow = 3 total seconds of consecutive CC on the groupfight cluster. With Amumu R (1.5s stun) the chain creates 3.5 seconds. HUMILITY itself can be used twice in a single extended fight if the cooldown was partially charged from a previous engagement.

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Randuin’s Omen