You have misunderstood me. I am not saying it is OP for killing creatures, I'm saying it's OP for making opponent's pay twice for a creature you will kill while this is in play. Black hole steals 36 quanta, but it's one use. As long as you have one of these on the field, the effect is permanent. Add in more than one, and the effect surely adds up. Of course this wouldn't be useful in a mono deck, but paired up with owl's eye, lightning, or a heavy control deck, this basically has the ability to cut your opponent's quanta count in half when they're paying double for every creature you kill. It sucks when you lose a 5 
lava golem due to a 2 
lightning, but 10 ? Instantly doubling? That is pretty overpowered. You could make it that instead of making the opponent paying the price again, make it pay 1-2 quanta of the element of the creature you just killed.
Ah, i missunderstood. but i still disagree. in your example you are losing a 5
lava golem because of a 2
spell and then you are losing 5
quanta because of a 4
permanent triggered by said spell. yes it will add up. but no one has infinte lightning. and this wont shut down your game, because its not a continuous drain like devourers. it will just delay your play. if you have no creatures on the field to kill you wont be left without quanta to play permanents and pc.
on the flip side i believe your suggestion of a 1-2 quanta of each creatures element would be more powerful than the card as it is. because you are adding drain to creatures that currently are unnaffected by this card, such as photons. lets look at a fire rush. they generally play a couple photons [or gnome riders], lets assume it is 3 at the beginning. You play CB. they immolate one of their photons and play a lava destroyor. you play firestorm.
under the current scenario. the player loses 5
quanta because of the destroyer death (or depending on how much quanta, less than that and relic in the hand). under the scenario you suggested the player would lose 2
for the immolated photon (which they dont have resulting in a relic), and then 4
and 2
for the remaining two photons and destroyer killed by the firestorm (probably resulting in 2 to 3 more relics in the hand).
so in comparison: 5
or <5
+ 1 relic
versus 6
+ 2
or slightly less drain and 2-3 relics in the hand.
(side note: it must be tired, im feeling really combative at the moment)
