I noticed the same thing with jellebrium mediator. It might have something to do with the recent ability name change.
@Sokolov get one this pls. Still doesn't work and how else am I supposed to beat other skellie users. Some love pls.
You the best, Sok. Edit: Getting people saying that it's still not working. Haven't tested it myself. Edit Edit: Works on Hoarfrost Lich. Thanks, mate.