Reach Revenant Graves
Prepare for the Mammon route and enter the Revenant Graves encounter. Activate a nearby Beacon first so a failed attempt does not cost a long repeat journey.
Complete the unlock chain
Defeat Sester Secundus, claim Sester's Censer, then return to Genessa in Marrow Keep. The unlock finishes through The Funeral memory rather than at the boss arena.
After the unlock
Review Genessa's distinct upgrade behavior before spending resources. Treat the new Shell as a new build foundation, not a cosmetic swap.