An ancient book titled The Only Sun on the Sky.
It is not known when anyone wrote down, but it contains knowledge of the heavenly bodies.
Seeing the intense energy of the sun, it began to exert its natural power.
It resonates with Great Hero's Boots.

For each 2 Refine Levels:
ATK +15

For each 3 Refine Levels:
Increases melee physical damage by 4%.

Refine Level +7:
Increases damage of Prominence Kick by 20%.
ASPD +10% (Decreases after attack delay by 10%).

Refine Level +9:
Increases damage of Solar Burst by 25%.

Refine Level +11:
Increases physical damage against enemies of enemies of every race by 15%.

When equipped with Great Hero's Boots:
STR +10, ATK +7%.