Randuin's Omen

Stats

Values as the League of Legends Wiki's item data lists them, for every mode; the data doesn't state their units.

Effects

• Humility (unique): Unleash a shockwave around you that slow nearby enemies by 70% for 2 seconds.
• Resilience (unique): Reduces incoming damage from critical strike by 30%.³

Arena changes

• Health changed to 300.⁴

• Randuin's Omen is recommended against mages with Jeweled Gauntlet to reduce their damage output.⁵
• Randuin's Omen can reduce damage from Yasuo and Miss Fortune.⁶
• Randuin's Omen is bought for its unconditional damage reduction, which is not tied to a stat that can be shredded or pierced.⁷
• Randuin's Omen can be built even when playing an ADC or caster.⁸
• Randuin's Omen can help counter Vayne builds that rely on critical strikes; Blade of the Ruined King may deal more damage against high-health enemies unless Sword of the Divine or Jeweled Gauntlet substantially increases critical strikes.⁹

• Randuin's Omen reduces ability damage enhanced by Jeweled Gauntlet.¹⁰¹¹
• Randuin's Omen reduces damage from Sword of the Divine.¹²
• Randuin's Omen reduces damage from crit-based abilities and augments that grant critical strikes to effects that do not normally critically strike.¹⁰
• Randuin's Omen can reduce damage from Smolder with Vulnerability.¹³
• Randuin's Omen can help make a squishy champion tanky enough to avoid being one-shot.¹⁴

• Randuin's Omen reduced critical-strike damage by 30%.³¹⁵ Earlier Arena format

Earlier formats

• Randuin's Omen was chosen from a random anvil only when 12 or 14 players were playing AP champions.¹⁶ 8x2 duos
• Randuin's Omen countered attacks from multiple critical-strike champions.¹⁷¹⁸ 8x2 duos
• A critical strike could increase damage against Randuin's Omen more than the item reduced it.¹⁹ 8x2 duos
• An on-hit build could deal more damage over time than a critical-strike build against Randuin's Omen.²⁰ 8x2 duos
• Randuin's Omen was picked against Jhin because it reduced damage from critical strikes.²¹ 8x2 duos
• Randuin's Omen was picked for its critical-strike damage reduction against critical-strike attacks from Kindred and Ashe.¹⁸ 8x2 duos
• Randuin's Omen was chosen for its critical-strike damage reduction against critical strikes from an enemy with penetration.²² 8x2 duos
• Randuin's Omen was built for its critical-strike damage reduction.²³ 8x2 duos