- Talk to Brelyna Maryon
- Let her cast a spell on you
- Wait a few in-game hours to let the effects wear off
- Let Brelyna try again
- Wait for her to finish
After you've completed Under Saarthal you can find Brelyna Maryon back at the College (likely in the Halls of Attainment). When you talk to her she'll request your help. Agree to help, and she'll cast a flawed spell that will put a green film over your vision.
It fades after a few in-game hours, then you'll be able to give her a second chance. She'll fail again, several times, turning you into various forms of wildlife including a horse, cow, and a dog. She turns you back and thanks you for giving her a "starting point" for her experiments.
