Mage Slayer | Magic: The Gathering
Formats Mage Slayer is Legal in
Official Oracle Text for Mage Slayer
—Kresh the Bloodbraided
Official Rulings for Mage Slayer
5/1/2009 : When the equipped creature attacks, the first ability will trigger. When that ability resolves, that creature will deal damage equal to its power to defending player, even if Mage Slayer has left the battlefield or is equipping a different creature by that time.