Banshee's Blade - Mirrodin (MRD)

Equipped creature gets +1/+1 for each charge counteron Banshee's Blade. Whenever equipped creature deals combat damage, put a charge counter on this card. Equip 2 (2: Attach to target creature you control. Equip only as a sorcery. This card comes into play unattached and stays in play if the creature leaves play.)