Cheapest priced copy (Unfinity): $0.35 at Card Kingdom, near mint, their price list as of .
The Space Family Goblinson 
Legendary Creature — Goblin Guest · 1/1 · Uncommon · Unfinity · #270
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.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $0.35 to $1.99 at Card Kingdom
2 rulings from Wizards of the Coast
- 7 October 2022If you roll more than one die at a time, however, that does count as multiple die rolls.
- 7 October 2022Remember that if a die is rerolled, that counts only as a single roll. The original roll doesn’t count. Similarly, any die roll that’s ignored doesn’t count.