Become a Mentor for an Eltnen Reserve and defeat the Fiends of Eracus.
Step 1. Become a MentorAn Instructor for Group Members. You can reach Mentor status only if a Group Member is 10 or more levels lower than you. for an Eltnen AdeptA Daeva between levels 28 and 38 who works mainly in Eltnen. and defeat Fiends of EracusRefers to creatures on the Eracus Temple Cavern floor. They include Old Eracus Gargoyles, Shielded Skyrays, Wild Sandstorm Spirits, Blackclaw Fangwings, Flirtatious Temptresses, Relentless Bloodwings, and Eracus Mugolems. (x5).
Step 2. Talk with VelatrisA Daeva at the Eltnen Fortress who belongs to Orichalcum Key..