Arcane Vessel

Your body falls into a catatonic state as your soul leaves it and enters the vessel you used as the spell’s material component. While your soul inhabits the vessel, you’re aware of your surroundings as though you were in the vessel’s space. You can’t move or take reactions. The only action you can take is to project your soul up to 100 feet from the vessel, either returning to your living body (ending the spell) or attempting to possess a humanoid body.

You can attempt to possess any humanoid creature within 100 feet of your range that you can see (creatures protected by the protection from evil and good or magic circle spells can’t be possessed). The target must succeed on a Charisma saving throw. On a failure, your soul moves into the target’s body, and the target’s soul becomes trapped in the vessel. On a success, the target resists your attempt to possess it, and you can’t try to possess it again for 24 hours.

Once you possess a creature’s body, you control it. Your game statistics are replaced by those of the creature, though you retain your personality and your Intelligence, Wisdom, and Charisma scores. You retain the benefits of your own class features. If the target has class levels, you can’t use any of its class features.

Meanwhile, the possessed creature’s soul can perceive from the vessel, using its own senses, but it can’t move or take actions.

While possessing a body, you can use your action to return from the host’s body to the vessel if it’s within 100 feet of your range, returning the host’s soul to its body. If the host’s body dies while you’re in it, the creature dies, and you must make a Charisma saving throw against the DC of your own spellcasting ability. On a success, you return to the vessel if it’s within 100 feet of your range. Otherwise, you die.

If the vessel is destroyed or the spell ends, your soul immediately returns to your body. If your body is more than 100 feet from you or if it’s dead when you attempt to return to it, you die. If another creature’s soul is in the vessel when it’s destroyed, that creature’s soul returns to its body if it’s alive and within 100 feet of its range.

Otherwise, the creature dies.

When the spell ends, the vessel is destroyed.