Dead Cells

1. Get to either Black Bridge or the Nest
2. Take the Fractured Shrines exit
3. Exit to Undying Shores
4. Exit to the Mausoleum

To get to the Undying Shores from the Fractured Shrines, you have to be wearing the Cultist outfit. You can find the blueprint in the Fractured Shrines itself by examining any of the dead cultist bodies lying around. However, you can also use the Homunculus Rune () to possess one of the bodies and immediately equip the Cultist outfit, avoiding any extra runs just to make it to the Undying Lands.