|Synthesis Category||Food, Poison, Supplement|
|Gathering Location||Catacombs, Night's Domain|
- "As its name suggests, it's a mysterious mushroom. All unidentified mushrooms are called by this name. It's your choice whether or not to eat it."
- — Atelier Rorona Description
You need to bring Iksy to either of the two areas above in order to get them to spawn.
Mystery Mushrooms are required to make Mushroom Pie.