Located within Affril, Plane of Knowledge. This particular rift leads back to Ulos.

A rift can only be opened with powerful objects. Some may be embedded in other larger devices, such as the Gurlung Colossus. Others may be smaller, but no less powerful.

A durgolium chest sits next to these containers. You open it and uncover the Immortal Knight’s Helm. You take the helm in your hands and feel its power. It pulls against your grip and somehow you know that it is moving you homeward. If you follow its lead, you will leave this world and return to Ulos. - Above the Dreaming Sea (RPA-ADV10)