The ground of my oasis was contaminated after the attack. What to do?
Removing Soil Contamination
Once you unlock Naia. You’ll get an item from them. (Crafting from their altar).
You can also put the little vine mushroom pods (forgot the name, but I’ve found blue and yellow ones so far and they are used in the poison poultice) over the contaminated area for 20 seconds or so and it will cleanse the soil for you.
It’s okay if there’s not enough support for them, you can move them back afterwards. It’s perfect for the wraith puddles.