My Other Self (I am Thou, and Thou art I)

You enter into a contract with the strange master of the Velvet Room. Never more than a doorway distant from you, he guides your path through the strange fate set upon you, in an effort to help you progress beyond it. But help is never free, is it...?

At 1st level, you gain the ability to summon your Other Self in varied forms - either as your signature form, or a prepared form. As an action, you can magically summon your Other Self to come to your aid. It appears in a space adjacent to you and shares your turn, movement, action, and bonus action, and reaction.

Whatever form the creature takes, it retains its attributes, but uses your Proficiency Bonus, and can never be more than 60 feet away from you. While a form is summoned, you and it share resistances, vulnerabilities, immunities, and senses. Any damage dealt to your Other Self is in turn dealt to you as Psychic damage.



Signature Form

At 1st level, you have a signature form of your choice. This form must have a challenge rating less than or equal to your proficiency bonus. You may summon this form as often as you wish, but it only remains for a number of rounds equal to your proficiency bonus.

Additionally when you gain a level in this class, you can replace your signature form with another, which also must have a challenge rating less than or equal to your proficiency bonus.



Studied Forms

When summoning studied forms, you must expend a spell slot equal to or greater than the challenge rating of the form you're summoning. This form remains for a number of minutes equal to your proficiency bonus, and requires concentration. Psychic damage dealt to you via your Other Self doesn't trigger concentration checks.

You prepare a list of studied forms that are available for you to summon. When you do so, choose a number of forms equal to your proficiency bonus. The forms must be of a level for which you have spell slots.

You can change your list of studied forms when you finish a long rest. Preparing a new list of studied forms requires time spent studying their attributes: at least 1 minute per challenge rating for each form on your list.

After you summon a prepared form this way, you cannot summon that form again until you take a short rest.