girlsgeneration, this costs more than a regular Fate Egg, so not OP by that standard. You'd be using two cards and more quanta to get the same effect as a card already in the game.
The hatch cost is kind of a problem. If the user can't hatch it the majority of the time, this becomes a very OP source of creature control - the only other instant-kill spell in the game is the Freeze/Shockwave combo, which costs two cards. On the other hand, hatch cost at zero would mean you'd only want to use the spell against powerful creatures, midrange would be too risky.
So far hatch matching the creature's element is the best I can come up with, though that means 99% of the time he can rehatch it anyway and I guess we are back to square one. Someone else PLEASE take a crack at this, it's making my brain hurt and I'd hate to see a good idea fail to get balanced.