ドラゴンボーンの焼(やき)き払(はら)う者(もの)

: 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."