Why have singularity be a separate card if black holes already have them?
I'm trying to design those drain-all-quanta spells. Singularity is the one for Gravity.
Possible uses for this card:
Save yourself for one turn. After you use it, your opponent can't do ANYTHING the next turn, unless he plays 0 or 1 cost creatures. It won't stop creatures from attacking, but it ensures that your opponent can't do anything else. Remember, quanta is generated after your opponent ends his turn.
Extreme denial. Kill all his pillars with EQ, then use Singularity. Boom, no pillars, no quanta, dead.
Also, this could potentially kill Immolation decks.