Soul Binding

A Friend For Life
Soul binding is a ritual quite similar to creating a familiar, however, there are some very different factors: The creature is one that is already alive and it must wish to bind its soul to yours.

Very similar to the Find Familiar spell, Soul Bind is a ritual which, as its name should already tell you, binds the two souls between a "Master" and a "Familiar." The Familiar is referred to as a "Match" or "Confidant" when speaking specifically through Arcane terminology. The Familiar must be able to understand what the Master is attempting to do during a Soul Bind, as well as agree to it without being forced. The Familiar cannot be tricked into a Soul Bind.

Abilities
You bind a creature with a CR rating equal to, or lower than, 1/4th your character level to your service.

The Soul Bound Familiar acts completely independent of the Master, but will be forced to always obey your command, even a deadly one. In Combat, it rolls its own initiative and acts on its own turn. A Soul Bound Familiar can do any action in its statblock, but can only attack once per round. A Confidant can attempt to break the Soul Binding with a DC 15 Wisdom Saving throw to avoid doing a suicidal command.

As an action, your familiar can be sent into a pocket dimension where it will await your summoning, however, it still requires food, water, and sleep. The Familiar can change the pocket dimension as it wishes, but cannot take anything it has created from the dimension out of it. The Familiar can take things into it, but is unable to release them inside the dimension. As an action, the Master can resummon the Familiar to any unoccupied space within 30ft.

When the Confidant drops to 0 hit points, it begins making death saving throws. Upon death, the Confidant's soul is torn into the afterlife, taking a piece of the Master's soul with it. The Master must make a DC 14 Constitution saving throw. On Failure, the Master falls to 0 hp. On Success, the Master takes 4d6 Force damage. A new familiar cannot be Soul Bound for one month, As the Master's soul must first regenerate from tear within their very spirit.

You can't have more than one familiar at a time. If you cast this spell while you already have a familiar, it fails.

The Ritual
The Master must draw the a 10 ft diameter arcane sigil of transmutation on the floor. In the center of the circle, a lit brazier of brass must consume 1000gp worth of charcoal, rare herbs, and a specialized incense. The Master must declare their intentions and give their best argument to attempt to turn the creature towards allowing the Soul Binding. Some creatures may be completely against it, refusing any kind of deal of servitude. Others may do it without the need to be convinced. Once convinced, the ritual begins.

The ritual requires the Master and Confidant to enter an uninterrupted trance for 4 hours.