Graegarus, Maw of Death

Flying, Projected Breath (Whenever Graegarus,
Maw of Death attacks, it taps but does not enter
combat. Instead, it deals X damage to up to X targets,
where X is Graegarus, Maw of Death's power.)
Whenever a creature you control attacks, you may instead remove it from combat and give
Graegarus, Maw of Death +X/+0 until end of
turn, where X is the creature's power.