Webster's Revised Unabridged Dictionary · 1913

Mythic

Mythic , adjective

[Latin mythicus, Greek {not transcribed}. See Myth.]

Of or relating to myths; described in a myth; of the nature of a myth; fabulous; imaginary; fanciful; mythological.
The mythic turf where danced the nymphs. — Mrs. Browning
Hengist and Horsa, Vortigern and Rowena, Arthur and Mordred, are mythical persons, whose very existence may be questioned. — Macaulay

Also: Mythical