All special abilities rely on Transcendent energy, which ordinary people cannot activate. Only Transcendents, and those who follow the corresponding path, can use them.
For example, Bloody Glory is a category of Fel Energy, so Charles could never possibly gather the Eight Great Knights' Certificates.
Without transforming into a beastman, Charles is also unable to activate the Bloodthirsty Fighting Spirit.
This minor spell, known as "Evil Eye," though widely adaptable, still relies on Fel Energy. That is, almost all the Power of the Evil God and Fel Energy - related Transcendent energy can be cultivated, but not other types of Transcendent energy.
It is at least seventy to eighty percent similar to the Mask of the Cat. It can condense an Evil Eye at the brow, devour the soul of a living being, and acquire some of the victim's memories and a few skills.
However, this spell cannot strip others of their special abilities.