At Ivris' shop if you navigate to the "Reagents" purchasing and selling menu the player is able to acquire negative reagents and infinite money by just selling reagents they don't have. You can see this bug occurring with the "Tall Reeds" in one of my screenshots, however this does work with every reagent.
You are not able to do any alchemy with the negative reagents either, even though the Create button lights up in the "Alchemy" menu when you select them.
Platform: PC
Build: 0.4.44 Steam version
You are not able to do any alchemy with the negative reagents either, even though the Create button lights up in the "Alchemy" menu when you select them.
Platform: PC
Build: 0.4.44 Steam version