A box containing a spellbook which strengthens specific Shadow Equipment.
You can randomly acquire 1 of 17 types of Shadow Spellbook that grants 1-2 Random Options.

[Obtainable Items]
Almighty Shadow Spellbook
Major Auto Spell Shadow Spellbook
Hasty Shadow Spellbook
Durable Shadow Spellbook
Perfect Size Shadow Spellbook
True Gemstone Shadow Spellbook
Experience Shadow Spellbook
Clever Shadow Spellbook
Infinity Shadow Spellbook
Lord Bearer's Shadow Spellbook
Mega Blitz Shadow Spellbook
Absorb Shadow Spellbook
Maximum Mammoth Shadow Spellbook
Full Temperament Shadow Spellbook
Reload Shadow Spellbook
Spell Caster Shadow Spellbook
Trait Status Shadow Spellbook