Siege-Gang Commander is a rare Creature — Goblin card from Dominaria Promos (PDOM), collector number 143p. Current market price: $0.32 (foil $2.19), TCGplayer market prices via Scryfall.
When this creature enters, create three 1/1 red Goblin creature tokens. {1}{R}, Sacrifice a Goblin: This creature deals 2 damage to any target.