He had only known one person who had passed it on 'Very High' and that person had been so traumatized by the experience that he never selected any difficulty above 'High' in the future.
The Challenger's Return: Rebirth of the Rainbow Mage
[Asura is just like the one you heard when reincarnating, a Goddess. The reason why you have your current Soul Spirits is due to them being gifted to you by the Goddess Of Fortune. Due to them being close, the Goddess Of Fortune is able to give Asura's Blessing under consent]