The term mythopoeic (`of or pertaining to myth-making`, noun mythopoeia; also mythopoetic, noun mythopoesis) has several applications: ...
giving rise to myths
• (a.) Making or producing myths; giving rise to mythical narratives.
mythopoeic, mythopoetic 1. Relating to, involving, or engaged in the production of myths. 2. Serving to create or engender myths; productive in mythmaking.
of or pertaining to the making of myths; causing, producing, or giving rise to myths.