This ingredient is mentioned in a scroll:
While I don't have a witch flower yet, I would be interested in how to make powdered grim cap. Maybe it is used in other recipes which I have not yet discovered. Adding different amounts of grim cap with/without flasks to the mortar did not give any results.
Best Answer
I mixed a grim cap, blooddrop blossom (the descritions says: Witches of the north use them in dark rituals.) and a cave nettle. What I get is a Sulphurous Potion (Rage: Attack Power +10, Evasion -10). Maybe this is meant?