Every 2 refine rate, ATK + 3, CRI + 2.
Every 3 refine rate, ATK + 2%, increases critical damage by 3%.
Every 4 refine rate, increases Mayhemic Thorns damage by 5%.
If refine rate is 7 or higher, increases long ranged physical damage by 10%.
If refine rate is 9 or higher, P.ATK + 5.
If refine rate is 11 or higher, reduces fixed casting time by 0.5 seconds.

When equipped with Sky Thorns Sword, increases Mayhemic Thorns damage by 20%, increases critical damage by 20%,
if the sum of refine rate of Sky Rune Crown (Biolo) and Sky Thorns Sword is 24 or higher, and grade of each is A or higher, and Mayhemic Thorns is learned at level 5 or higher,
reduces skill cooldown of Mayhemic Thorns by 0.2 seconds, increases Mayhemic Thorns damage by 10%.

[Bonus by grade]
[Grade D] P.ATK + 5.
[Grade C] Increases long ranged physical damage by 15%.
[Grade B] Increases physical damage against all size enemies by 10%.
[Grade A] Increases physical damage against all property enemies by 10%.
Class: Headgear Defense: 50
Location: Upper Weight: 0
Armor Level: 2
Required Level: 240
Jobs: Biolo