Every 2 refine rate, MATK + 5.
Every 3 refine rate, MATK + 2%, increases earth property magical damage by 2%.
Every 4 refine rate, increases Diamond Storm and Terra Drive damage by 5%.
If refine rate is 7 or higher, increases water and earth magical damage by 10%.
If refine rate is 9 or higher, S.MATK + 5.
If refine rate is 11 or higher, reduces fixed casting time by 0.5 seconds.

When equipped with Sky Elemental Book, increases Terra Drive damage by 45%, increases earth property magical damage by 15%,
if the sum of refine rate of Sky Rune Crown (Elemental Master) and Sky Elemental Book is 24 or higher, and grade of each is A or higher, and Terra Drive is learned at level 5 or higher,
reduces skill cooldown of Diamond Storm by 0.3 seconds,
reduces skill cooldown of Psychic Stream by 1 second,
when using Psychic Stream, auto-cast Terra Drive level 5.

[Bonus by grade]
[Grade D] S.MATK + 5.
[Grade C] Increases Terra Drive damage by 10%.
[Grade B] Increases magical damage against all size enemies by 10%.
[Grade A] Increases magical damage against all property enemies by 10%.
Class: Headgear Defense: 50
Location: Upper Weight: 0
Armor Level: 2
Required Level: 240
Jobs: Elemental Master