Tumeken's shadow is a two-handed powered staff requiring 85 Magic to wield, and is only available as a rare drop from the Tombs of Amascut. The staff is extremely valuable as, when matched with other high-end magic gear, it excels with its damage and immense accuracy even against magic-resistant monsters.

Powered by the sun itself, the staff was created by the god Tumeken during the Kharidian–Zarosian War as a means to fight back against the invading force of the Zarosian Empire. It was also used to create Tumeken's Warden and Elidinis' Warden, two massive automata imbued with the divine essence of himself and his wife Elidinis.

As with all powered staves, Tumeken's shadow is not able to use its built-in spell against other players outside of minigames.