DMDave Megadelve - Help me pick the first monster theme! (Patreon)

Behold! This behemoth you see before you was randomly generated using donjon's random dungeon generator. It's the first level of my tip jar megadelve project that I'm working on. Basically, it's going to be a neverending dungeon project that you, the patrons, help me create.

The hook of this adventure is that the PCs wake up in a random room in the dungeon with no idea how they got there. Then, they must adventure through this colossal maze to try to unravel its secrets.

As a tip jar contributor, you help push the project forward. Then, we as a community member, vote on the different themes of the various sections of the dungeon.

What should the theme be for the first part?

You get as many votes as you like. Voting ends in 12 hours.