The Space Family Goblinson 
Legendary Creature — Goblin Guest
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.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL