Heat globe

Heat orbs are items used in the Temple of Sennisten quest. The player must place one on a pedestal to temporarily melt the large block of ice blocking the entrance to Ghorrock and the other ice blocks under the fortress. When placed on the pedestals, the heat from these orbs also turn the Icefiends into Waterfiends, and vice versa when the heat orbs are removed from the pedestals.

after quest there is a heat orb on the floor in the room where you defeated the Ice Demon that currently has no known uses as the pedestals refuse to take it because of some unknown magical force