Dragonborn Immolator
Creature — Dragon Shaman2/4
: This creature gets +1/+0 until end of turn. Gift of Tiamat — When this creature dies, if its power is greater than 0, note its power. You get a one-time boon with "When you cast a creature spell, it perpetually gets +X/+0, where X is the noted number."
Not legal in Commander