Shock Brigade is a common Creature — Goblin Soldier card from Tarkir: Dragonstorm (TDM), collector number 120. Current market price: $0.24 (foil $0.28), TCGplayer market prices via Scryfall.
Menace (This creature can't be blocked except by two or more creatures.) 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.)