The story of Potion Permit is simple enough: you’re a chemist from the big city, moving to a small, quaint island to help heal what ails the quirky but loveable people living there. As you progress through the game, you’ll uncover new things that need to be unlocked in order to progress and expand the world of Moonbury.
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One such thing is the bright purple glowing waste taking up space in the second half of Meadow Range. Documents littered around hint at a disaster, and it’s up to your chemist to piece together what happened, craft a solution, and implement it to rejuvenate the area again. Learn more about how to complete the quest Unknown Residue in this guide.
To begin this quest, you’ll need to have finished the Clearing the Landslide quest that unlocks the second half of Meadow Range. The area to begin Unknown Residue will be inaccessible before this quest is finished.
Once you’ve got all of Meadow Range at your disposal, head to the southern part of it by the entrance to the desert area you’ll unlock much later in the game. There’s a teleportation spot right by where the path turns to sand in the southernmost part of the map, and that’s where you’ll be starting from.
From the teleportation spot, head left for a few steps until you’re able to go north, and doing so will trigger a cutscene. Your chemist checks out the mess here for a moment before Forrest arrives to tell you everything he knows about what happened. What he knows is that something happened, and he says Myer would definitely know more about it.
When you find Myer, he’ll take you to his office to discuss what’s going on, and you learn the real reason the town has been so against you so far – they made the mess
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