I never use potions of purity to loot the gold from those gas rooms anymore. I just turn them into potions of cleansing now! If I need the extra gold I just use a couple of shots of aqua blast to block the gas vents.
It’s a spell you can make (last page of alchemy recipes list) using a potion of storm clouds and an arcane catalyst plus 2 energy. When catalysts are removed (upcoming version) it’ll cost more energy but no catalyst (equivalent resource input).
You get 8 charges of aqua blast for one recipe. I believe it is equivalent to a geyser trap in that it knocks creatures back and creates a bunch of water on the floor. You can use this for a variety of things including covering up (destroying) traps, dousing fires, making a water highway for running fast with armour of flow, giving you a place to regen with a potion of aquatic rejuvenation, etc.
This is the dumb everyone learns the hard way. 😆
Another dumb is trying to move and not wait out vertigo from confusion gas trap making you fall down into a chasm and dying to fall damage.
That's one I make the mistake of more than I will ever admit. 9/10 it's not near a pit, 1/5 times of that 1/10 times I am also lucky enough to not fall in