I like this card. Don't get me wrong. This is a great idea, with some balancing (increased cost, less healing) it would easily fit into the game. Armagios, of course, come to mind. Reverse Time would work to balance this card, though since not every deck can hold RT, maybe you should make it so that the target creature heals 20 or even 30. Then it would be perfect, and no doubt would make it to the reliquary.
Seeing as you're one of those people who doesn't like criticism much, I've taken to constructive praise. But I really meant what I said.
Thanks, Butterfree, if you're reading this. Thank you for the reviewing guide. -skyironsword, your biggest fan