Despair.

The old man was forced to drop Valerian from his grip. The boy lay on the ground, squirming and whimpering from the pain in his body. The old man located the creature that stood in his way, and scoffed as he said, "So, a chicken also dares to attack me?" 

His words unintentionally sparked the rage of an arrogant dragon. He called Fortuna a chicken. Even if she was in the form of a thunder falcon, this behavior was untoward, and she found her image and ego to be tarnished by this remark thus she let out a shrill cry and a stream of lightning zapped at the old grandmaster. 

The attack stunned and repelled the Valkyrian veteran to a significant distance of twenty meters. Fortuna initially wanted to attack the old man even more, but when she found Valerian whimpering and struggling in pain, she put the thought of revenge aside and made an agile turn.