Randuin's Omen

+400 Health
+60 Armor
-10% Damage taken from Critical Strikes

UNIQUE Passive - Cold Steel: When hit by basic attacks, reduces the attacker's Attack Speed by 15%.
UNIQUE Active: Slows the Movement Speed of nearby enemy units by 35% for 4 seconds (60 second cooldown).

(Unique Passives with the same name don't stack.)