The Space Family Goblinson is a uncommon Legendary Creature — Goblin Guest card from Unfinity (UNF), collector number 270. Current market price: $0.30 (foil $0.19), TCGplayer market prices via Scryfall.
The Space Family Goblinson has trample as long as you've rolled three or more dice this turn. Whenever you roll a die, put a +1/+1 counter on The Space Family Goblinson.