Talk:Heimerdinger/@comment-175.141.152.217-20111031115054/@comment-5052127-20120425193714

Cass is NOT the only exception, heimerdingers rockets DO still get the 35% slow from Rylai's.. they are not aoe, and they are not a spammable single target spell like karthus' or cass' (read the link you posted, the rule you are talking about which cass is an exception to only applies to single target skills with less than a 3 second cooldown).

For whatever reason, most likely because of the fact that they aren't targeted and the unreliability of hitting multiple champs with them in many situations, Heimderdingers' rockets are counted as single target spells for purposes of Rylai's slow. Unfortunately, his turrets don't benefit from Rylai's at all.