So I found a barrow hill, it seems obvious to try to make a xp grinder out of it (I don't really know anything about thaumcraft). While I was making it, I noticed that wisps started to spawn more and more. Then, after a while, I got a message in the chat that said "A nearby node spews forth something foul". I got really creeped out, left my world and then did a bit of researching. It turned out that it meant a giant angry zombie spawned due to the high amount of flux in the area. Is there a way to get rid of the wisps, or some way to keep the flux level down?