Rylai's Crystal Scepter -Ashe
Dealing spell damage slows the target's Movement Speed by 35% for 1.5 seconds (15% for multi-target and damage-over-time spells).
What is considered spell damage, and on which of Ashe's abilities would this apply to, and would it stack with her toggle ability?
(I'm sorry if i posted in the wrong board, i wasnt sure if i should post it here because its about ashe or gamplay balance because of the scepter)