This homebrew feat is to unlock lore native custom races on RPDND: Paths of the Past (a minecraft dungeons & dragons roleplay server)

An alien race with massive and intelligent brains, selectively bred to be delicious slaves.
Native Variant of GITHZERAI or GITHYANKI

Native Traits:

• Alien Build. Your anatomy makes it impossible to wear armor, but your psionic aura gives you a base armor class of 13 + your Dexterity modifier. You can still benefit from shields, as long as you are proficient. Additionally, you can take an Action to focus psionics around your skin for one hour or until you lose concentration (as if you were concentrating on a spell). While active, your base AC is 18. (No Dexterity Bonus, shields still provide their AC bonus)
• Creature Type. You are an Aberration. You have a hovering speed of 20ft.