- Music: "tartarus_0d01" (Thebel Block's Music)
Monad becomes available after the player both reaches the top of the Adamah Block and completes Elizabeth's 53rd request, defeating The Reaper. In the original version of Persona 3, it would become accessible right after reaching the top floor of the Adamah Block, instead of needing to beat The Reaper to gain access). It will appear as an enormous door to the right of the stairs at the entrance. It only has 10 floors, but the floors are a great deal larger than the rest of Tartarus. It contains Shadows of level 88 and above, which are an excellent way to level up and reach Level 99 quickly. A chest located on the 10th floor also contains 1,000,000 yen.
Monad is available right on the beginning of the second cycle as well, and is part of Elizabeth's 55th quest, where the player must fight "The Ultimate Opponent" on the 10th floor.
Visually it resembles the Thebel Block, but with an orange color theme instead of green.
|Grand Magus||88||432||246||Fire||-||Strike||-||Ice, Light, Dark|
|Vehement Idol||89||435||247||Light||-||Wind||-||Pierce, Fire, Dark|
|Divine Mother||90||438||249||Ice, Dark||-||Elec||-||Light|
|King Castle||92||464||228||Wind||Light, Dark||-||Elec||Strike|
|Amorous Snake||93||470||230||Ice, Dark||Slash, Strike, Pierce||-||Fire||Light|
|Hallowed Turret||94||520||220||Elec||Light, Dark||-||-||Slash, Strike, Pierce|
|Acheron Seeker||96||478||235||-||-||-||Fire, Ice, Elec, Wind||-|
|Eternal Sand||97||481||236||Slash, Strike||-||Fire, Ice, Elec||Wind||-|
|Void Giant||98||484||237||-||-||-||Slash, Strike, Pierce||Light, Dark|
|Chaos Cyclops||98||487||239||-||-||Light, Dark||Ice||-|
- The word Monad is taken from Gottfried Wilhelm Leibniz's theories, Monad being the spiritual equivalent to the atom in his postulates about the nature of the world. Another reference to the Monad is made in the earlier game Persona 2: Eternal Punishment with the Monado Mandala dungeon.