Where is the parts for the supreme arcane staff?

In the game "Old School RuneScape," the parts for the Supreme Arcane Staff can be obtained from the bosses in the Tombs of Amascut raid. Specifically, players need to defeat certain bosses like the final boss, Amascut, to acquire the staff parts. Once players have collected all the necessary components, they can combine them to create the Supreme Arcane Staff.