First up, here's a reminder of the fruit I've made since that will be important for the Renegades to have. Grizzle even brought it up.:

I'd go for apples, oranges, bananas, mangos, star fruit (new), and carrots. Anyway...

There's a star fruit.
After that, here's a mining helmet, which would be a good cave monster drop and an important item for ambience.:

Yeah, it's a mining helmet, which is also used for exploring caves. It's got a light on it. Yep.
Next up, here's a staff for the Citonium set: the Citonium Lamp.

I was going for a street lamp motif as the set was inspired by Courtney from Total Drama. Yep.
Next up, we got the main attraction: monsters. For this one, I got four. First up, here's a glowworm.:

It'd probably be either a mob or an NPC (making it the first animal NPC). It's main gig? Lighting up caves.
Next up, we got a bat that's all ears.:

This would be the first flying monster if it's implemented. This bat was inspired by false claims that bats are blind. This bat is actually blind, but to make up for it, it's got a head full of ears. That way, it can use echolocation from any direction. Yep.
After that, we got a drill mole.:

It was rushed, I'll admit. Heck, Robby could come up with a better design than my rush-job. I just really wanted a drill mole in the game, so I made this thing as fast as possible.
Lastly, we got a stalagmite that shoots rocks.:

Yeah, a stalagmite. I figured it would work. If it had a texture, it would fit into the game much more, but Illustrator doesn't do that, so yeah.
That aside, that's all the cave stuff.