Yup. OP. Killing someone's creatures and they paying again? OP.
Im sorry but are you arguing that this card is OP because it kills an opponents creature?
because it doesnt. it just adds quanta drain to creature death if you spend some
. which in my opinion goes pretty well with deaths theme.
as far as the quanta drain being op, how about black hole: only costs 3
and 36 quanta is drained and you get healed for every one of those quanta.
I dont think this card is OP. This card does not kill creatures, it does not drain quanta every turn (devourers), it does not heal you (black hole), it does not shuffle you quanta every turn (discord). It can be completely blocked by sanctuary (which i think fits in nicely with the death vs light them). and death currently has no insta kill cards (think fire lance, lightning, or shockwave), so it would not be OP in a mono deck. Creatures with no cost [ROL, Malignant cells, sparks, just to name a few] are completely unaffected by this card.
This card is very strong in the following situations:
1. you have played it early and you can kill the first creature the opponent plays (if it is not one of the no cost creatures mentioned above). you will slow down both their draw and their ability to play cards. (note that this will be difficult to achieve because you will need the quanta to play both charon's bribe and an attack spell [which will probably not be a death card] within the first turn or two)
2. you opponent is playing high cost creatures and you have something to kill multiple of them with. for example multiple lightnings or an owl eye. (in which case your opponent will adjust their play style to take into account that they may be forced to pay extra quanta)
3. you opponent is playing a rush of alot of cheap 3 hp creatures and you play firestorm, in which case you will drain them of alot of quanta or fill their hand with cards. and by alot i mean like, 12 giant frogs at 2
apiece which would mean that I drain from you 24
quanta. (lol, i laughed just thinking about this. I want this in the game just to be able to pull this off
) at most you will be delaying them like 2 turns or so before they can start playing creatures again. (note that most times i use firestorm its going to be when there are like 7 creatures on the field, not 12, so the average quanta drain isnt going to be like 24 everytime)