Floor 4-5 (Undead Sage)

Sage Battle (Normal Mode)

Undead Sage
Eeliforce Level 45	Riffra Level 45	Frostag Level 45	Biomez Level 45	Skulcrow Level 45
Specific conditions  10 turns (opponent side)

Sage Battle (Hard Mode)

Undead Sage
Eeliforce Level 60	Riffra Level 60	Frostag Level 60	Riffra Level 60	Cerberus Level 60
Specific conditions  8 turns (opponent side)

Reward

Sage Seal of Persistence
[Grants the ability to find random gem chests in the Tower]