Banshee's Blade
Artifact — Equipment
Equipped creature gets +1/+1 for each charge counter on this Equipment.
Whenever equipped creature deals combat damage, put a charge counter on this Equipment.
Equip (: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)
Bradley Williams
Mirrodin (MRD)
• #144Rulings
The counters stay on Banshee's Blade even if it becomes unattached, or moves from one creature to another.
(wotc • 2004-12-01)
Rulings
The counters stay on Banshee's Blade even if it becomes unattached, or moves from one creature to another.
(wotc • 2004-12-01)