7th-level Spell: Soul Transfer

Dream Magic (Necromancy)

Your body falls unconscious as your soul enters the spell's material component. You perceive from the component using your senses, but can't move or use reactions. You can only use your action to project your soul up to 100 feet, either to return to your living body (ending the spell) or to try to possess a creature with the humanoid tag's body that you can see. Creatures warded by a Protection from Otherworldly Influence or Circle of Protection spell can't be possessed.
The target must make a Charisma saving throw. On a failure, its soul is trapped in the component, and you take control of its body. You use its physical statistics and features, but retain your alignment and mental ability scores, and your GM determines which mental features you may use. You can use your action to return to the component if it is within 100 feet, returning the target creature's soul to its body. If the target succeeds at its Charisma saving throw, you can't attempt to possess it again for 24 hours.
The possessed creature can perceive from the component using its senses and can repeat its saving throw as an action after every hour. It can take no other actions. On a success, the target returns to its body and you return to the component if it is within 100 feet; otherwise, you die.
If the target's body dies while you possess it, the creature dies, and you must make a Charisma saving throw against your spellcasting DC. On a success, you return to the component if it is within 100 feet; otherwise, you die.
If the spell ends or the container is destroyed, each affected soul attempts to return to its body if it is alive and within 100 feet; otherwise, it dies.
Nothing other than the Zenith spell can prevent these soul deaths. When the spell ends, the container is destroyed.

• At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, the possessed creature can repeat its saving throw once per day. When you cast this spell using a spell slot of 9th level, the possessed creature can repeat its saving throw once per year.

Source: SDS (Magic Jar)

• Casting Time: 1 minute
• Range: Self
• Components: V, S, M (a tiny ornate container worth at least 500gp)
• Duration: Until dispelled
• Ritual: No