Artifact — Equipment, 2 (2)
Common
Equipped creature gets +0/+3 and can block an additional creature.
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)
Wars are not fought on a single front.
Illus. Ryan Pancoast

5/1/2012: Abilities that allow a creature to block an additional creature are cumulative.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Extended (Type 1.X)
Legal in Standard (Type 2)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern