Artifact — Equipment, 2 (2)
Rare
Equipped creature has first strike and gets +X/+0, where X is the number of instant and sorcery cards in your graveyard.
Equip {2}
As sharp as its bearer's words of faith.
Illus. John Avon

9/22/2011: The value of X is constantly updated as instant cards and sorcery cards are put into or removed from your graveyard.
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