Aura hypnosis ability is based on mana, she just compares her mana power to her opponent, and the weaker one loses all free will. Frieren is one of the most powerful wizard in the world... so she got cocky, but she didn't know Aura had another ability:
I would like a slave who stays with his nose and mouth inside my pussy to smell and eat the aroma 24/7 days, the aroma of my pussy will be the oxygen for him 🦋🥵🥵🥵♥️