Ultimate pack 1.1.2
Green chat text: "The air around you suddenly becomes suffused with strange energies."
Now since there is no timestamp I don't know if this showed when I was in my base or on a Mystcraft quarry world. I did notice a wisp outside my base the other day and I hadn't seen that before, is this a wisp spawning message? I haven't done anything with Thaumcraft yet so I have no idea if I am awash in flux or have a toxic node outside my base or what.
The Mystcraft Age is stable (no negative effects.) Tiled Extreme Hills/Mountainous Desert eternal noon mining world. There is one of those formations with a chest and wisps in the distance.