I think you may have just gotten unlucky or weren't fast enough. My node remained sinister until I was able to throw down a few Blooms to save it, but it remained Sinister for a good 15 minutes while I was fighting the cultists.Thank you all for your responses! Another puzzling issue if I may: the eldrich obelisk and the portal to Outer lands.
I have found obelisks all with a tainted node not a sinister one. Is it that it becomes tainted cause im not quick enough to spot it and biome-change it? Cultists can still channel as long as the fibrous taint dont damage them but eyes dont work.
Does they generate within the twilight forest so I can use that portal? how do you got around it? thanks in advance