[Random] Skill Advancement Box

Open to obtain one of the following items:

Skill Advancement Scroll I (30-35 items)
Skill Advancement Scroll II (30-35 items)
Skill Optimization Scroll I (15-22 items)
Skill Optimization Scroll II (15-22 items)
Skill Advancement Tome I (70-153 items)
Skill Advancement Tome II (15-30 items)
Skill Advancement Tome III (10-20 items)
Skill Advancement Tome IV (1-3 items)