The Arcanum's Scholars is a group founded by Parthenios Lilt at Corrival Academy. Under the guise of a history study group, the members are actually part of the anti-Sanctuary. They all include students at Corrival Academy with an open hatred towards mortals.
The group is named after Rebus Arcanum, a supposedly long-dead explorer into "Realms Unknown". He himself was part of a secret society that wore masks. To honour this, Lilt makes the group wear golden masks.
Lethe calls the group "First Wave", meaning that they will form the first attack in the upcoming war between the mortals and the sorcerers.