25x Sinners Ash

The Sinner's Ash Relic are remnants of the Forge of Sin that stain one's very soul and corrupting their Resonance in the process.
(one-time use, re-obtainable)

Using Sinner's Ash whilst having a bell will not reroll your bell's current allocated Resonance stats. Alternatively, with an already corrupted Resonance, It will only reroll its downside. Using the Sinner's Ash without having obtained a Resonance will do nothing, and dialogue will appear saying "The ashes don't seem to have any effect."

Using Sinner's Ash in Duke Erisia's Manor after defeating the Duke while having a Murmur and meeting the stat requirements to obtain Soulbreaker will grant you the Oath without corrupting your Resonance. More info on the Soulbreaker page.

The known downsides of a Corrupted Resonance are as followed:

WITHER: On use player will receive Wither for 10% of their max HP.
MANIA: On use, player will lose 40 sanity.
POISON: On use, player will lose 7% HP. If used below 6% health, you will be left at 1 health.
BLOOD LOSS: On use player will lose 15% of their max blood.