Talk:Rylai's Crystal Scepter/@comment-4636093-20120316050400

A single target spell has a 4 second cooldown, does it still get the full slow if it's dropped below 3 seconds via CDR? What if it's got a 4 second cooldown at rank 4 of the spell but a 3 second cooldown at rank 5? Upgrading it actually hinders its effectiveness?