Perfected Yandir's Might

(2 items) Adds 129 Weapon and Spell Damage (3 items) Gain Minor Slayer at all times, increasing your damage done to Dungeon, Trial, and Arena Monsters by 5%. (4 items) Adds 129 Weapon and Spell Damage (5 items) Adds 1487 Offensive Penetration, Dealing Critical Damage grants you a stack of Giant's Endurance for 5 seconds, up to one every half second. Each stack of Giant's Endurance adds 41 Weapon and Spell Damage, up to 10 times. Completing a fully-charged Heavy Attack removes Giant's Endurance and grants Giant's Might for 15 seconds, increasing your Weapon and Spell Damage by 63 per stack removed. You cannot have Giant's Endurance and Might active at the same time.