anyone able to tell me where i get the items? for the potion or where to use it
Go into the forrest with Purple and meet the "zebra horse".
She tells you where you can get the items and what you need to collect them.
To get the mushrooms you need to go to the forrest at night to see which of them is glowing.
To get the poisoness herbs (blue or purple if i remember correct) you need to buy some gloves first
And the last item is in the cave in one of the forrest locations, but to get in you need a glowstick first.
The Zebra also tells you how to make a glowstick and crafts it for you if you have all the ingredients (Apple Cider and something else i dont remember anymore)
edit: once you collected everthing , go back to purple and talk with her about the mirror(first item). You can start the Chemistry minigame now. ( i recommend a savegame before u start because it can be a bit tricky to find the right combis)
Oh and since you need all three items to repair the mirror and only two are actually in the game by now there is no reward for completing this quest sadly.