Slagwurm Armor is a common Artifact — Equipment card from Duel Decks: Mirrodin Pure vs. New Phyrexia (TD2), collector number 21.
Equipped creature gets +0/+6. Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)
All Duel Decks: Mirrodin Pure vs. New Phyrexia cards and prices