median zephyr
If you use Spirit Form to enter Ashlands before you have Blessing of the Wolf, you get the same heat distortion screen shader effect you usually do, but you're immune to damage because your physical body isn't actually within Ashlands. When Spirit Form ends, you return to your body outside Ashlands, but the heat distortion effect doesn't go away. It persists no matter where you go, distorting other places like Frigid Peaks, until you restart the game or use a portal.
Some more examples:
steady saffron
@summer vessel
visual flower
Oh interesting, does it damage your physical body once you’re back to the body or does it only affect how the screen looks