Wrath Shield

Cast this spell only if you have 15 or more rage counters.
Enchant creature with defender.
When Wrath Shield enters the battlefield, return
each other Shield enchantment attached to
enchanted creature to its owner's hand.
Enchanted creature gets +X/+0, hexproof,
trample, and can attack as though it didn't have defender. X is equal to the number of rage
counters you have.