Artifact Creature — Golem 2/4, 5 (5)
Uncommon
Basalt Golem can't be blocked by artifact creatures.
Whenever Basalt Golem becomes blocked by a creature, that creature's controller sacrifices it at end of combat. If the player does, he or she puts a 0/2 colorless Wall artifact creature token with defender onto the battlefield.
Illus. Scott Kirschner

11/1/2005: The token creature is put onto the battlefield at the end of combat only if the blocking creature is sacrificed during the resolution of the triggered ability.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander