Berserker Predator's Mask

Equip {3} (Can only be equipped by a Berserker Predator creature)
Equipped creatures get +1/+4 and has whenever equipped creature attacks you may pay {3} and if you do then put a trophy counter on target creature and that creatures blocks equipped creature if able.
whenever a creature with a trophy counter dies gain X mana of any one color where is X is that creature's power.