Cloisters of Bevelle (possible spoilers)

Can someone please tell me how many cloisters there are in the Bevelle underground that the kinderguardians discover. Also could you tell me what happens when you reach the last cloister? thanks

You travel downwards through a dungeon known as the Via Infinito, fighting progressively tougher bosses every twenty levels. You also encounter enemies from throughout the game along the way.

When you reach the last Cloister, you face the two most powerful bosses in the game.

As well as get good accessories like Cat Nip and Iron Duke.

100 cloisters.