Underdog Racer

Mana cost: {4}{G}

Type: Creature — Dog Pilot

This spell costs {1} less to cast if your team is currently behind. (If neither player can see the scoreboard or easily verify, that means it's Schrödinger's race and you're in a quantum superposition of maybe losing and so this costs {1} less.)
When this creature enters, destroy target artifact an opponent controls.

All printings