This becomes a card-neutral way to copy any powerful creature you control for one turn
But his draw effect should provide plenty of value, and theres no denying that his flat +1/+1 boost to other Faeries will come in handy, allowing you to quickly rack up damage with a wide host of fliers
Killian, Decisive Mentor Black-White enchantress sounds fun, and a goading/aura subtheme feels novel enough for Orzhov/Prismari
These decks have been a blast to play with and most of them are a huge success right out of the box
Fortunately, this is offset by Jin-Gitaxias' rather hefty mana cost, and that each half of it only triggers once each turn
Paying 2 each turn just isnt feasible, although I could imagine a world where sacrificing it could be beneficial, but this is highly unlikely with the powerlevel being where it is