i dunno, i like that the perms destroyed are random and the attacks have to be successful, but with the low cost of momentum in combination with popularity of chargers, both within this card's element, the "successful attack" balancing mechanism is reduced in effect. even with the gravity drain, it feels like a bit of a trump card to me. in combination with black hole, this could be used to remove both their stored quanta and their means to produce it. i guess the real question is- does gravity need another denial card?