Ahab Predator's Mask

Equip {3} (Can only be equipped by a Ahab Predator creature)
Choose a creature type, as long as Ahab Predator's Mask is equipped, creatures of the chosen type get -3/-3 and lose all abilities that aren't mana abilities when blocking equipped creature.
Equipped creature get +1/+3 and {3}{t}: scry 1.