Increases damage of Diamond Dust by 15%.

When equipped with Professor Stone II(Upper):
Increases damage of Diamond Dust by additional 10%.

When equipped with Professor Stone II(Mid):
Increases damage of Earth Grave by 20%.

When equipped with Professor Stone II(Lower):
Reduces skill cooldown time of Varetyr Spear by 1 second.

[iRO Description]
Increase damage of Diamond Dust by 15%
When equipped with Scholar Stone II(Upper), increase damage of Diamond Dust by additional 10%.
When equipped with Scholar Stone II(Middle), increase damage of Earth Grave by 20%.
When equipped with Scholar Stone II(Lower), reduce cooltime of Varetyr Spear by 1 sec.