Combustion Pledge

Pay X life: Creatures you control gain +2/+0 and "When this creature dies, it deals X-1 damage to any target. X can't be less than 1." until end of turn.
Sacrifice a creature with power 2 or greater: Combustion Pledge deals 2 damage to target creature and 1 damage to its controller.
"Combustion magic tends to eat you alive."