For each Level of Earth Grave:
Increases magical damage with every element by 2%.

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

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

[iRO Description]
For every level of Earth Grave, increase magical damage of all property by 2%.
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Set Bonus
Sorcerer Stone (Lower)
Sorcerer Stone (Garment)

Increase Poison Burst damage by 15%.
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Set Bonus
Sorcerer Stone (Lower)
Sorcerer Stone II (Garment)

Increase Diamond Dust damage by 15%.