When equipped with Thanos Greatsword-AD:
Increases damage of Wind Cutter and Servant Weapon by 20%.

For each 2 Refine Levels of equipped Weapon:
Increases Melee Physical Damage by 4%.
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When equipped with Thanos Axe-AD:
Increases damage of Axe Tornado and Axe Stomp by 20%.

For each 2 Refine Levels of equipped Weapon:
Increases damage of Axe Boomerang by 9%.
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When equipped with Thanos Spear-AD:
Increases damage of Hesperus Lit and Overslash by 20%.

For each 2 Refine Levels of equipped Weapon:
Increases damage of Overbrand by 9%.
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[Bonus by Grade of Headgear]
[Grade D]: POW +2
[Grade C]: P.ATK +2