For each Level of Diamond Dust:
Decreases variable cast time by 2%.

When equipped with Sorcerer Stone(Garment):
Increases damage of Psychic Wave by 15%.

When equipped with Sorcerer Stone II(Garment):
Increases damage of Varetyr Spear by 15%.

[iRO Description]
For every level of Diamond Dust, reduce variable casting time by 2%.
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Set Bonus
Sorcerer Stone (Middle)
Sorcerer Stone (Garment)

Increase Psychic Wave damage by 15%.
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Set Bonus
Sorcerer Stone (Middle)
Sorcerer Stone II (Garment)

Increase Varetyr Spear damage by 15%.