Bind Otherworldly Being

You create a momentary portal to a different plane than the one you currently reside in and attempt to bind the creature that emerges from it. You gain a level of exhaustion, and the portal appears. When you summon the portal, a creature native to that plane of CR 2 or lower emerges from it. You gain no control over it, but you can attempt to bind it's soul to yours as an action within one minute of it emerging. You must make a Charisma Saving Throw, the DC determined by the creature you summon and your DM. (usually DC 15 for CR 0-1/2, and DC 20-25 for CR 1-2) If you successfully bind it, it becomes your familiar. If you fail your saving throw or fail to attempt to bind it one minute after it emerges, it acts as it normally would in its current situation.

Your familiar acts independently of you, but it always obeys your commands. In combat, it rolls its own initiative and acts on its own turn. A familiar can take any actions it has.

When the familiar drops to 0 hit points, it disappears, having departed to its home plane, awaiting your call. It reappears after you cast this spell again, without the need for a Charisma Saving Throw.

While your familiar is within 100 feet of you, you can communicate with it telepathically. Additionally, as an action, you can see through your familiar's eyes and hear what it hears until the start of your next turn, gaining the benefits of any special senses that the familiar has. During this time, you are deaf and blind with regard to your own senses.

As an action, you can temporarily dismiss your familiar. It disappears into a pocket dimension where it awaits your summons. Alternatively, you can dismiss it forever. As an action while it is temporarily dismissed, you can cause it to reappear in any unoccupied space within 30 feet of you.

You can't have more than one familiar at a time. If you cast this spell while you already have a familiar, you can either dismiss the original familiar or allow it to form into the new creature.