Dragonspark Reactor - Kamigawa: Neon Dynasty - 137

Artifact

Mana Cost: {1}{R}

Whenever this artifact or another artifact you control enters, put a charge counter on this artifact.
{4}, Sacrifice this artifact: It deals damage equal to the number of charge counters on it to target player and that much damage to up to one target creature.

Uncommon · Kamigawa: Neon Dynasty · #137 (NEO)

Illustrated by Billy Christian