I had an idea today. I wanted to make a different kind of denial card that doesn't affect the quantum pool, it actually does the opposite.
I wanted to make a card that, when a card is played, if the cost brings it down below 1, it can't be played. That would block the drain spells, (fractal, miracle, sky blitz) and really only limits higher cost cards like dragons and nymphs.
My problem is that I don't know what element it should belong in, a name, cost, and whether this should really be worth making. Denial usually doesn't like low cost cards, and this doesn't fill that niche, and it would have to add more coding to card playing. It might be too situational, blocking those too. Maybe not so much if the card was stackable.