Gruul Bolt

Gruul Bolt deals 3 damage to target
creature. Target creature you control gets +3/+3 until end of turn.
At the beginning of your upkeep, if there
are 20 or more creatures in all graveyards,
exile Gruul Bolt. Creatures you control get +3/+3 until end of turn. Gruul Bolt deals 3 damage to each creature.