[Event] Hidden Shakatu's Luxury Box

A luxury box found in a secret storage that was created by the Shakatu Merchants long ago at the Velia Coastal Cave.
Press Secondary Attack to obtain several of the following according to a set probability:
Inventory +1 Expansion Coupon
Black Spirit Essence
Mount Skill Training Coupon
Courser's Aura
Sealed Book of Combat (1 Day)
Sealed Book of Life (1 Day)
[Event] Secret Book of Old Moon (1 Day)
[Event] Blessing of Kamasylve (1 Day)
[Event] Item Brand Spell Stone
Mount Skill Change Coupon
Theiah's Orb
Inventory +4 Expansion Coupon
[Event] Reward Seal x600