redjarman41,939 Locked 16 Apr 2021 16 Apr 2021
Unlocked by blowing up The Siren's skull after defeating her.
She's sometimes the boss of Mausoleum 1. To get there, after you beat the boss in The Depths 1 or The Mines 2, a door will appear with a spike on it. Walk into it to sacrifice 2 hearts and it will open the path to Mausoleum.
When she dies, her skin will melt off and her skull will be left on the ground. Blow it up with a bomb to unlock this