This is what I think:
Scrap the instawin idea.
Make it an elemental card, probably fire, darkness, or death.
Make it cost less and drain all quanta.
Make the wait much, MUCH less, maybe about 3 turns.
CHANGE THE EFFECT OF THE CARD TO DESTROY ALL CREATURES ON THE FIELD.
There, a recycled name and art with a much more usable effect that isn't quite so gamebreaking, while still keeping the spirit of the card.
Also, for the upgraded name I prefer Ragnarok, but that might just be me.