Caiman - A huge species of crocodile (7 species).
Water snakes - A mud and water living snake (20 species).
dirt and mud
There are several. Water, mud, and air are some examples.
unicornsacromantulasthestralscentaurshippogriffs
Messy things are all around us, from cluttered desks and untidy rooms to tangled cables and scattered paperwork. In everyday life, spilled food or drinks can create a mess quickly. Even in software development, messy code—disorganized and hard to read—can cause confusion and slow progress. Overall, messiness usually means things are unorganized, chaotic, or difficult to manage.
Those are called "Amphibians". Examples are frogs and toads.
mud
The bottom dwellers on the ocean floors eat plankton and other smaller animals. The bottom of the ocean is a sustainable condition for plankton because they cannot move against a current and this leads them to be within reach of fish that feed on them.
Examples non artifact
I Know some cliff dwellers were in arizona and new mexico. They used the cliff itself and mostly just rocks. I have been to a cliff dwelling in arizona called Montezuma's Castle. They were pretty basic. They used ladders made of wood to get up the cliff to their homes. They definitely used mud and rocks.
The city dwellers can lead to physical and mental health issues
Mud is anon-example of gravity.
Merpeople and the Giant Squid. Hope I could help! :)