Demon Devourer

Elric Mervinger, a descendant of a once-great wizarding family, is unable to perform magic due to a rare medical condition. While attempting to cure his disease, he stumbles upon the demon Mephistopheles, who tries to possess Elric to free himself from a dragon’s trap. However, Elric ends up absorbing Mephisto instead, and the two become bound together. With Mephisto by his side, Elric gains new powers and faces challenges that could restore his family's former glory.