Acceptance

 is a colorless mutation which halves the amount of enemies the player needs to kill in order to lift curses.

Location
The blueprint for this mutation can only obtained in 3+ BSC. Firstly, the player must gather all three s in the Promenade of the Condemned. Then collect the in the Ramparts, where they'll have to take the exit to the Insufferable Crypt inside a 3 BSC door. Then go through the Graveyard and the Forgotten Sepulcher and collect the remaining two s. The keys are hidden in secret areas, marked by vines on the tiles, and locked behind doors which are opened with s. The Acceptance mutation will be found in High Peak Castle, at the end of a secret corridor, behind three doors, which can be opened with the s.