ReDonkulous

Menace, first strike
Whenever Redonkulous enters the battlefield or attacks, create a barrel token. Its an artifact token with: 1, tap, sacrifice this token, deal 2 damage to any target. 2, tap, sacrifice this token and another creature you control. That creature deals damage equal to its power to any target.
Whenever you sacrifice a nonland permanent, target opponent chooses: you gain 2 life or you draw a card.