Mythical logia?

Mythical Zoan fruits seem to be classified based on if the model of their Zoan refers to either a creature that has never existed outside of myth, or a specific individual member of the species.

There are mythological substances that would be classified as natural materials if they existed, this makes me believe that mythological logias will eventually be introduced.

Here's some examples I came up with:

• Ichor, blood of gods
• Aether, the fifth element
• Dream sand
• Spirit fog

Also I believe in awakening logias can access more mythological aspects of the material they are made of.