Rylai's Crystal Scepter

+400 Health
+100 Ability Power

UNIQUE Passive: Damaging spells and abilities apply a Movement Speed reduction to enemies based on the spell type:

Single Target: 40% reduction for 1.5 seconds.
Area of Effect: 40% reduction for 1 seconds
Damage over Time or Multi-hit: 20% reduction for 1 seconds.
Summoned Minions: 20% reduction for 1 seconds.

(If a spell fits in more than one category, it uses the weakest slow value.)