Relic Robber is a rare Creature — Goblin Rogue card from Zendikar Rising Promos (PZNR), collector number 153p. Current market price: $0.41 (foil $0.25), TCGplayer market prices via Scryfall.
Haste Whenever this creature deals combat damage to a player, that player creates a 0/1 colorless Goblin Construct artifact creature token with "This token can't block" and "At the beginning of your upkeep, this token deals 1 damage to you."