for crafting once. once. not 30, one.
and besides, multicolored mushrooms aren't for the level 50 pots, it's for a level 30 Fury pot so idk what you're on about. you should be glad it's not a level 50 pot, you'd need well over 100 of them.
funny how when i was done with the multicolored mushrooms for food and alchemy it drops like candy when I'm farming for the smalls for the divinity dust. The wiki is crap in this department so I didn't know i'd need less than 200 later on. That place doesn't even list the stats, it's so halfassly done.