Penetration Enchantment

Piercing– a powerful, late-game enchantment book that is difficult to obtain. You can find Piercing I–III enchantment books in ancient cities. Through crafting, you can combine them to create level IV and V enchantment books. At level I, it ignores all damage reduction and deals original weapon damage + 2% of the enemy's maximum health. At level IV, it deals 10%; at level V, it deals 16%.