Book of Sorcery

Item ID 420182 Name Book of Sorcery
A mysterious book imbued with magical powers.
It is said to contain the wisdom of sorcerers.
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Increases Attack Speed (decreases After Attack Delay by 10%).
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For each Level of Psychic Wave:
Increases Magical Damage against monsters of every size by 3%.
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When Level 5 Extreme Vacuum is learned:
Decreases Earth Grave skill cooldown by 1 second.
Decreases Fixed Casting Time of Earth Grave by 100%.
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Type: Headgear
Defense: 0
Position: Lower
Weight: 0
Armor Level: 1
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Requirement:
Base Level 100
Weapon Level 0 Identifier Book_of_Sorcery
Attack 0 Type Armor
MATK 0 Equip Locations Lower Headgear
Defense 0 Equippable Jobs Sage
Range 0 Equip Gender Both (Male and Female)
Slots 0 Equip Upper Third, Third Upper, Third Baby
Weight 10 Min Equip Level 100
NPC Buy 0 Max Equip Level None
NPC Sell 0 Refineable No
Credit Price None Trade restriction None
Item Script 
bonus bAspdRate,10;
bonus2 bMagicAddSize,Size_All,3*getskilllv("SO_PSYCHIC_WAVE");
if (getskilllv("SO_VACUUM_EXTREME") == 5) {
   bonus2 bSkillCooldown,"SO_EARTHGRAVE",-1000;
   bonus2 bFixedCastrate,"SO_EARTHGRAVE",-100;
}