Suspended Cauldron
Large object
Armor Class: 19
Hit Points: 20
Damage Immunities: poison, psychic
Boiling Oil. The cauldron pours boiling oil onto a 10-foot-square area directly below it. Any creature in the area must make a DC 15 Dexterity saving throw, taking 10 (3d6) fire damage on a failed save, or half as much damage on a successful one.

A cauldron is an iron pot suspended so that it can be tipped easily, spilling its contents. Once emptied, a cauldron must be refilled-and its contents must usually be reheated-before it can be used again. It takes three actions to fill a cauldron and one action to tip it.

Cauldrons can be filled with other liquids, such as acid or green slime, with different effects.