Engineer's Palace

Leads to

• Western Skyway (East)
• Mana Crystal Mine (West; requires Lightning Soul and Divine Key)

Enemies

• Angel Soul Ranger
• Angel Shephard
• Angel Zealot
• Angel Templar

Crew

• Synthie

Boss

• Tagu's Sister
• Treu

Chests (List here)

• Book of the Old Gods (51)
• Spirit Stone (52)
• Grand Agate (53)