Desolation Giant

A board wipe that always takes your own side with it, and the only choice you control is whether the opponent goes down too. Cast it bare for four mana and the trigger destroys every other creature you control: a self-immolation that leaves a lone 3/3 standing, the play you reach for when your own board has become a liability (tokens you no longer want, creatures enchanted out from under you, a swarm an opponent is about to turn against you) and you would rather reset to a clean body than keep them. Pay the kicker and the verdict widens to all other creatures, yours included, so the asymmetry vanishes and what you get is a true symmetrical sweeper that still leaves the giant behind. That widening is the cost-to-power conversion at the heart of the design: the white in the kicker is what turns a parochial red effect that can only punish your own side into a genuine two-sided reset, the kind of full board clear red has rarely been allowed to cast on a creature. The tension lives entirely in the moment it enters: you decide, by how you paid, whether this is a desperate reset of just your half or a wrath that catches everyone. Either way the same body delivers the ruling and walks away from it, which is the only reason a sweeper this drastic comes attached to an attacker at all.