"Mythic power" refers to a special or extraordinary strength or ability that is often associated with mythical or legendary beings or stories. It suggests possessing a level of power that goes beyond ordinary or normal capabilities. Full definition
Robert Jewett has long pointed out the American infatuation with superhero figures with mythic powers whose sole purpose is to rid the world of evil, though they never seem to succeed completely. (religion-online.org)
Elizabeth Olsen's Wanda / Scarlet Witch exhibits a similar connection between personality and superpowers: Although much (too much) of her screen time consists of hovering over her wounded lover, Vision, while her raccoon eyes squeeze out tears, when she strides into the fray, waving her arms and emitting cracking scarlet beams, she suggests mythic power. (vulture.com)
This story has mythic power in large part as a testimony to what people are capable of when pushed to the extremes of human experience. (bookbrowse.com)