Ceremonial Torch

The Ceremonial Torch is blessed by priests of Bwonsamdi the loa of death, and is used on Princess Talanji's request by the Horde adventurer to burn the Zandalari corpses before the blood trolls can use them for their blood magic.

Source
This item is provided during Improper Burial and Bloody Intrusion which begin with Princess Talanji in the Fallen Outpost in Nazmir.