Here are the first two designs for the creature I've been thinking about making. They differ from the ones I originally planned out, but I think they look good this way. I'll make up lifeform profiles for them later once I have three more designs for the species, and once I draw them full-body style.

Also, the Jellyshroom Spined Lizard does have spines, they're just not on the head. Just mentioning that before anyone starts asking.

Art made in MS Paint.

Spined Lizards

The first two designs for the species, featuring a Jellyshroom Caves and Lava Zone design