Twice-Fanged Serpent

(2 items) Adds 129 Weapon and Spell Damage

(3 items) Adds 1487 Offensive Penetration

(4 items) Adds 657 Critical Chance

(5 items) Adds 2305 Offensive Penetration, When you deal damage, your Offensive Penetration is increased by 660 for 5 seconds, stacking up to 5 times. This effect can occur once every half second.