Creature — Orgg 6/6, 3RR (5)
Rare
Trample
Orgg can't attack if defending player controls an untapped creature with power 3 or greater.
Orgg can't block creatures with power 3 or greater.
It's bigger than it thinks.
Illus. Daniel Gelon

10/4/2004: Whether or not the creatures could attack or block is not important, just whether or not the defending player controls such a creature.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern