Rundvelt Hordemaster is a rare Creature — Goblin Warrior card from The List (PLST), collector number DMU-142. Current market price: $2.15, TCGplayer market prices via Scryfall.
Other Goblins you control get +1/+1. Whenever this creature or another Goblin you control dies, exile the top card of your library. If it's a Goblin creature card, you may cast that card until the end of your next turn.