It's located underwater, south of Saronia.
Follow the map and collect all treasures.
Bestiary Checklist:
Boss: Odin
Recommended Level: 35+
Odin has only 2 attacks (normal attack and Zantetsuken) and hits twice per turn.
Zantetsuken in Pixel Remaster is not as brutal as the 3D version; as long as you can keep up with healing, you should be fine. If needed, try using 2 healers.
Use Teleport or backtrack to get out.
Chests/Items:
- C-228: Golem Staff - B5, right section, bottom chest.
- C-229: Aegis Shield - B5, right section, top-right chest.
- C-230: Gaia Vest - B5, right section, top-left chest.
- C-231: Reflective Mail - B5, left section, bottom chest.
- C-232: Diamond Bell - B5, left section, top chest.
- C-233: Elixir (Monster) - B4, hidden room, top row, 1st chest.
Monsters: Ousroboros - C-234: Elixir (Monster) - B4, hidden room, top row, 2nd chest.
Monsters: Ousroboros - C-235: Elixir (Monster) - B4, hidden room, top row, 3rd chest.
Monsters: Ousroboros - C-236: Elixir (Monster) - B4, hidden room, top row, 4th chest.
Monsters: Ousroboros - C-237: Phoenix Down (Monster) - B4, hidden room, bottom row, 1st chest.
Monsters: Cenchos - C-238: Phoenix Down (Monster) - B4, hidden room, bottom row, 2nd chest.
Monsters: Cenchos - C-239: Phoenix Down (Monster) - B4, hidden room, bottom row, 3rd chest.
Monsters: Cenchos - C-240: Phoenix Down (Monster) - B4, hidden room, bottom row, 4th chest.
Monsters: Cenchos - I-057: Catastro - after defeating Odin **.
Give Catastro to your Evoker.