Alexander the Great's Xyston

Origin
Alexander needed to use something to tie onto besides his Spear that made him immortal so he could watch over his collection. With the wood from the Xyston and the Anvil of Hephaestus, he made the first Eldniari with the sparks of fire and kept it burning with the wood from the Xyston.

Collection
Nick, Artie, Myka and Pete went to the grave of Alexander the Great’s old horse Bucephalus in an underground cave around Jalalpur Sharif. In the cave, the gang found out that the Xyston wood was taken by Jalaluddin Muhammad Akbar's men and incorporated into one of his thrones.

Effects
The fire burning there was kept and a portion of the fire was used along the other Warehouses, this was not only a way to control the Warehouse but was also a power source. This force is what also helps the Warehouse move from one place to another. When the Warehouse needs another Caretaker, it will need the most valued possession of the would be Caretaker to be thrown into the fire or transferred through the Ribbon (As the Ribbon was created through the fire).