Artifact — Equipment, 5 (5)
Rare
Whenever equipped creature deals combat damage to a player, destroy all permanents other than Worldslayer.
Equip {5} ({5}: Attach to target creature you control. Equip only as a sorcery.)
"If that is what you seek, try looking in craters."
—Fodrus, mastersmith
Illus. Greg Staples

9/22/2011: The equipped creature is also destroyed.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Extended (Type 1.X)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern