By consume, I hope you mean sacrifice? There's something to be said about just autokilling off your opponent's cards.
Indeed, if it is a targeted effect this card would be very overpowered if enemy creatures could get consumed.
On the other hand, it may be possible to balance inclusion of enemy creatures if the selection is random.
Essentially, this card would then become a heavily offensive weapon with a high chance of consuming its allies.
It would make for an interesting standalone creature (i.e. decks centered around having a single one of these on the field).
If this is an avenue you want to take it, however, there should probably be some kind of restriction on what can get eaten (like something akin to devour or paradox).
Similarly, if an enemy gets eaten, the quanta should probably go to the consumed cards owner.