After killing the Demon of Song, one of the tunnels in the boss arena leads to this bonfire. In Scholar of the First Sin the doorway to this bonfire is blocked by a petrified Hollow and will require a Fragrant Branch of Yore to access.
Up the stairs from the bonfire there is a locked door which will only open if you have rescued the two Milfanito (one in the room before the Demon of Song boss fight (DO NOT attack her!) and the other with the Key to the Embedded in Drangleic Castle). You also have to be in hollow form.
Through the door, there are three crawling bodies which may drop Bleed Stones and Poison Stones. Further on, there is a Prowling Magus. Inside the building at the Altar of Amana there's a singing Milfanito and a flaming shrine you can pray at to reverse hollowing.
- Down the spiral staircase in a busted out alcove there is a Fire seed
- Down the spiral staircase and out the door (facing out towards the water) on the side of the walkway to the left there is a metal chest containing the Manslayer
- Down the spiral staircase and out the door (facing out towards the water) on the side of the walkway to the right there is a metal chest containing a Bonfire Ascetic
If you have a Human Effigy in your inventory the altar will not turn you human and will instead display "Alas, nothing happened". Effigies on the ground and in the item box will also count.