Balduvian Berserker (DMU 116)

Creature — Kor Berserker • Mana cost: {2}{R} • Dominaria United • Uncommon

Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.)
When this creature dies, it deals damage equal to its power to any target.

Illustrated by Cristi Balanescu.