mythologize

US /maɪˈθɑː.lə.dʒaɪz/
UK /maɪˈθɑː.lə.dʒaɪz/
"mythologize" picture
1.

to create a myth about something or someone; to treat something or someone as a myth or legend

:
The film tends to mythologize the historical figure, often overlooking his flaws.
Over time, the simple story was mythologized into a grand epic.