Add Champignons for Alchemy

[Audiosmurf]

You know you wanna

[Reiber]

wait, are champingnions exempt from being mushrooms in alchemy?

[Sevenless]

wait, are champingnions exempt from being mushrooms in alchemy?

Farmable crops are not alchemical ingredients.

My only concern: Doesn't adding new alchemical ingredients scramble all the combos? I'd rather it only happen at world start/end because it's a pain

[Luno]

They are already in alchemy. They are edible mushroom which means they cant be used as base.
THey are not, iirc however, herbs, and they are also not alchemical ingredient(despite being a base).
But we did have cremini/button/portobello potions last world.
EDIT:
Potion recipe from world 14.