"The Desert Perpetual" Lore Book Unlocks

Unlock "The Desert Perpetual" lore book, titled The Immanent, by earning its 8 entries in The Desert Perpetual Raid. It is part of the Atemporal seal triumphs, added in Season 27, and comes from The Edge of Fate-era content.

Entries are unlocked by solving the secret chest puzzle after completing each encounter of the selectable bosses in the raid.
Each encounter completion with the puzzle solved gives one additional entry; there are 8 entries (Now and hereafter, A perfect when, Down?, The root of unity, Eternal life, You and I and I and you, The last time we were apart, Gloria mundi).
The book follows Maya Sundaresh after the Upheaval on Nessus; she becomes a hybrid of human and Vex network.

Because bosses are selectable, plan clears so every boss is eventually done with the secret chest solved.

Requirements