Cauldron walker

Telepathic Bond. While the homunculus is on the same plane of existence as its master, it can magically convey what it senses to its master, and the two can communicate telepathically.

Alchemical servant. 

Whenever you cast a spell while within 5 feet of the cauldron, you gain a bonus to one roll of the spell. That roll must restore hit points or be a damage roll that deals acid, fire, necrotic, or poison damage, and the bonus equals your Intelligence modifier (minimum of +1).

Bonk. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 3 blugeoning damage, and the target must succeed on a DC 10 Constitution saving throw or be stunned for 1 round. If the saving throw fails by 5 or more, the target is instead stunned for (1d10) rounds and prone while stunned in this way.

Acid splash (3 times per day): A shimmering green blob erupts toward a target within range and bursts in a spray of acid. +4 to hit, reach 30 ft., one creature. On a hit, the target takes 4d4 acid damage immediately and 2d4 acid damage at the end of its next turn. On a miss, the blob splashes the target with acid for half as much of the initial damage and no damage at the end of its next turn. (weakened version of acid arrow)

Magic liquid
The creator can use a bonus action to name one liquid from the table below to cause the cauldron to produce the chosen liquid. Afterward, the cauldron slowely starts filling itself. The maximum amount of liquid the cauldron can produce depends on the liquid you named.
Once the cauldron starts producing a liquid, it can't produce a different one, or more of one that has reached its maximum, until the next dawn.