The warp cost on this is wild. This might be playable in a combo deck just because of that.
I like how it's designed to not break planeswalkers. There are a couple that come into play as creatures though (Gideon Blackblade and Kaito, Bane of Nightmares). I don't think it works with Kaito due to its wording ("as long as Kaito has one or more loyalty counters on him" aka you still lose Kaito if you minus him to zero while he's a creature), but Gideon enters as a creature ("as long as it's your turn"), so it should have its loyalty doubled.