@Sokolov Why does Coven Claw's Essence Claw create a "copy" of said unit when it destroys one, and not an undead version of it? Wouldn't it only make sense for a FW Witch who uses a special ability to finish off a champ to create an undead clone? Would be nice to look into this as it would fit better getting undead. Also, why does it add warding to the copy? There aren't many people who are going to drop a spell on a, usually, 10-15 hp summon. Is this to keep from things like reanimate dropping a full HP copy for us?
Warding prevents a lot of shenanigans, honestly. Some are less of a problem than others, but... it seemed best to just avoid the whole thing. There are still some ways to break it, I am sure, but hopefully we don't need to nerf/redesign it.
