On A Mushroom Foray is a side quest of Necropolis playthrough in Might & Magic: Heroes Online.
The witch is glad someone came to her, since her ingredients are being eaten away by ghouls. Thus, she asks of the hero to find 4 green and blue mushrooms, which will help her make a stew to feed these ghouls permanently. The mushrooms are found around the land, some of which are guarded by monsters. Once done, the hero has to return to the witch