User blog comment:Deshiba/No counterplay/@comment-20434720-20140520040827

Yorick has a permaslow? The numbers on his W here on the wiki must be off, could you or someone verify them in-game?

The ghoul lasts 5 seconds (less if it gets hit) and the ability is on, with max CDR, a 7.2 second cooldown. And that slow is somewhat similar to how Cassiopeia's W is technically a permaslow (9 sec cooldown, 7 sec duration, lasts 2 secs after refresh).

Rest was interesting and noted.