Note: As of April 2nd, Mythic Eggs can no longer be burned to reveal Mythics. Follow Moonbirds on X for more information]
A Mythics egg contains within it the soul of a Mythic.
There are three types of egg: Legendary, Runic, and Stone. A Legendary Egg can spawn three Mythic forms; it will be down to the minter to decide which form their Mythic will take. A Runic Egg has two potential forms, and a Stone Egg only one.
