Rafe, Grimmsveil Terror

+2: Until end of turn, Rafe becomes a legendary 6/6 Wolf creature with trample, indestructible, double strike, and haste.
-3: Deal 6 damage to target attacking or blocking creature. You may activate this ability on any player's turn any time you could cast an instant.
-5: Destroy all creatures, they can't be regenerated. Deal damage to each opponent equal to the combined power of their destroyed creatures.