Damater

The damater is a black-colored plant of the nettle family. It usually grows deep in marshes.

Recipe: Damater Cream 
Crushed and mixed with pure water, lemon juice, and some oils, its maceration helps heal wounds caused by acid. The application is very painful, the scar that will remain is usually horrible, but the damage will be healed.

The effect: 
A preparation of damater applied to a wound restores 1d8 hit points lost due to acid damage.