Good point, Higurashi.
Oh, btw, I realized I didn't comment on whether or not it stacks. Frankly, I've forgotten the thoughts I had on that implementation, so I'll leave it up to the public's discretion. Personally, I think it should stack, and I think stacking is already counter-balanced in that it's really difficult to have 4 empty spaces in your hand each turn AND less than 3 quanta (it's more likely you have 0 cards and a bunch of quanta or 7 cards and no quanta), and at the very worst it buffs the Mono-Gravity Rush with a diverse range of creature costs. However, if you think the card would be better if it didn't stack, then just imagine it so.