Talk:The Black Cleaver/@comment-82.143.207.26-20130115181704/@comment-5266525-20130122232347

The armor shred isn't an on-hit effect, though, it's an on-physical-damage effect.

I know that Annie's Tibbers procs Rylai's slow, which is considered an on-spell-damage effect, so I reason that it's likely the same for Yorick's ghouls.