Homebrew Eidolon Species Details

Creature Type

You are a Undead. 

Size

Your size can range from Small to Medium

Speed

You have a hovering (6inch off the ground) Hovering Speed.

Astral Ire

You know one of the following cantrips of your choice: Chill Touch, Sacred Flame, Toll of the Dead, or Sword Burst. Intelligence, Wisdom, or Charisma is your spellcasting ability for it (choose when you select this race).

Darkvision

You can see in dim light within 60 feet of yourself as if it were bright light, and in darkness as if it were dim light. You discern colors in that darkness only as shades of gray.

Faceless

You have proficiency in the Deception skill.

Idyllic Step

As a bonus action, you can magically teleport up to 30 feet to an unoccupied space you can see. You can use this trait a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Idyllic Trance

You don’t need to sleep, and magic can’t put you to sleep. You can finish a long rest in 4 hours if you spend those hours in a trance like meditation, during which you remain conscious.

Whenever you finish this trance, you gain proficiency in one skill of your choice and with one weapon or tool of your choice, selected from the Player's Handbook. You mystically acquire these proficiencies by drawing them from shared elven memory and the experiences of entities on the Astral Plane, and you retain them until you finish your next long rest

Phantasms (Recharges after a Long Rest). You magically creates an illusory duplicate of yourself. The duplicate moves with you and mimic your actions, shifting position so as to make it impossible to track which of you is the real one. 
Whenever any creature targets you with an attack or a harmful spell while a duplicate remains, that creature rolls randomly to determine whether it targets you or the duplicate. A creature is unaffected by this magical effect if it can't see or if it relies on senses other than sight.
A duplicate uses your AC and uses your saving throws. If an attack hits the duplicate, or if a duplicate fails a saving throw against an effect that deals damage, the duplicate disappears.

Eidolon Traits

Idolatry