A strange head of unknown origin carved from archtree. It speaks when thrown on the ground.
This head says "I'm sorry". Have another look. Isn't it quite the expression of atonement?
When used it will say 'I'm Sorry' for any Unkindled in your vicinity.
Can be obtained from Pickle Pee in return of an Shriving Stone (only once per NG)
Note that in Dark Souls 3, you do not need to reload to complete the trade. Dropping the item inside the nest is sufficient.