The Cauldron of Thunder is a special cauldron that is used in Druidic Ritual. Players need to dip raw chicken, raw beef, raw rat meat and raw bear meat into it. It is located in Taverley Dungeon, just northeast of the entrance ladder.
The cauldron is guarded by two level 19 Suits of armour that are right outside the gate. Between the cauldron and the entrance are level 22 skeletons. Players with lower combat levels should be aware of this.