totally OP. It's easy to win with EM. You just play that on yourself the last turn and here you are. And obviously destroys the opponent healing: bye bye SoG, healing, miracle, feral bond, holy light, white nymph,...
if it can stop all of these cards, it may cost much more or do any negative effect on you.
First of all: "he target player Max HP is equal to his current HP+1" - to avoid direct EM
Then: "This spell consumes all your dark quanta left" - to avoid use it all the time
The cost should be a bit higher (Oldtrees should help better here).
And of course, delete that: "Put this card back to your hand" - this is a triumph, doing that every turn.