Stadium Headliner is a rare Creature — Goblin Warrior card from Tarkir: Dragonstorm (TDM), collector number 122. Current market price: $0.89 (foil $0.87), TCGplayer market prices via Scryfall.
Mobilize 1 (Whenever this creature attacks, create a tapped and attacking 1/1 red Warrior creature token. Sacrifice it at the beginning of the next end step.) {1}{R}, Sacrifice this creature: It deals damage equal to the number of creatures you control to target creature.