Random idea, so I sculpted it in meshmixer and printed with tree supports.

The Idea: Sometimes when a coven of witches or hags abandon their lair strange things happen. On rare occasions, the ambient magic in their many cauldrons used to brew and stew so many magical poultices and curses will combine to form a cauldron golem. The cauldron golem will wander aimlessly seeking out magical potions to add to itself for unpredictable and sometimes explosive effects. Spellcasters finding a Wandering Cauldron can sometimes make it into a faithful servant or guard as long as it is fed potions. Possible attacks would be bludgeoning hits, and acid damage from spilled contents, as well as random and wild spell effects that could be beneficial or not.