Just keep on Tumbling...

💎 𝗡𝗲𝘄 𝗶𝘁𝗲𝗺! Cleaning Cube Wondrous item, common ___

This Tiny, sentient piece of an enchanted gelatinous cube is harmlessly soapy, instead of acidic, and enjoys cleaning the surfaces it travels across. When found, the "cleaning cube" is a dehydrated, 2-inch cube. While dehydrated, the cube is inanimate and its weight is negligible. You can place the dehydrated cube in 1 or more gallons of water as an action, causing it to animate and grow in size to become a 1-foot cube that weighs 6 pounds. The rehydrated cube moves slowly while animated in this way, methodically cleaning objects and surfaces it comes into contact with. The cube remains hydrated for up to 8 hours, but can be squeezed as an action (as if it were a sponge) to dehydrate it again early.

The "cleaning cube" is considered a magical object and is not a creature. It has a speed of 1 foot and can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. It has AC 10, 10 hit points, and has resistance to all damage. The cube dehydrates when it drops to 0 hit points, but regains all its hit points when hydrated again.

𝙎𝙚𝙣𝙩𝙞𝙚𝙣𝙘𝙚. The "cleaning cube" is a sentient unaligned item with an Intelligence of 1, a Wisdom of 6, and a Charisma of 1. It has hearing and blindsight out to a range of 60 feet. It can’t speak or read, but obeys your commands as best as it can understand them.

𝙋𝙚𝙧𝙨𝙤𝙣𝙖𝙡𝙞𝙩𝙮. The "cleaning cube" is happiest finding and dissolving dirt and other grime, and enjoys the feeling of moving across clean, polished surfaces. It doesn’t concern itself with combat, preferring to continue its cleaning instead of involving itself in confrontation. If the cube finds a stray coin, gemstone, or other similar small item out of place while it cleans, it will absorb and clean the item until it’s removed by a creature as an action or until it becomes dehydrated once again. ___

We’ve finally found it

(remember Worldbuilding Wednesday?? We need to bring it back.)

I had a d&d character some years back that I came up with a very cool concept for, that I haven't been able to use since.

Scroll was a dwarven knowledge cleric. They worshipped a god known as the Grand Library. The Library is a god that is also a place, a deity of knowledge that manifests as a repository of it.

Anyone who is deep enough in an archive, library, or other collection of knowledge might take a wrong turn and find themself in a different place, a pocket universe where the floors are marble inlaid with poems and equations, and the shelves are stacked with tomes no mortal has ever seen. The Library does not speak, but when it chooses you as a cleric you know it as well as you know your mother tongue. Those chosen may come and go as they please; many stay to tend the ever-growing twisting halls of the Library, but others venture forth to find more material, or to enlighten the world with knowledge.

The city-complexes within the library support thousands of clerics. Enclosed terraces with glowing marble ceilings grow bountiful crops. The farmer-librarians know every agricultural technique that has ever existed; their crops are genetic libraries in themselves.

“Grace says he would like half of dome to be water.”

“Oh, is necessary for humans to have large amounts of water question?”

Small Eridian equivalent of a sigh. “No. Not needed for life. In fact Grace will die if he falls in water and does not get out.”

“Tell him we give him water in containers that won't kill him. Lots lots lots of water on Erid for Grace to drink.”

“No. Grace say he want water on ground. Also want it with excess sodium chloride compound so it will be unhealthy for drink.”

“Grace want this liquid for celebration.”

“Of course.” They scan it. “You have wrong liquid. This contain compounds which are poisonous for humans.”

“Yes yes yes. Grace say humans like feeling of being slightly poisoned.”

Eridians are fighting over minute details over the tank settings and decor. That gravel is too big, the artificial ocean waves aren’t hitting the simulated shore correctly. We need more fake plants to make the human happy but not those ones.