True Imprisonment

You create a magical restraint to hold a number of creatures equal to the amount of statuettes used for material components, to a max of 6, that is on the same plane as you for the final minute of the casting. The target must make a Wisdom saving throw. On a successful save, the target is unaffected, and it is immune to this spell for the next 24 days. On a failed save, the target is imprisoned. While imprisoned, the target doesn’t need to breathe, eat, or drink, and it doesn’t age. Divination spells can’t locate or perceive the imprisoned target, and the target can’t teleport. Spell scrolls of True Imprisonment must specify a target because of the nature of the spell's components. The cost of the statuette required for the spell depends on its size rank: Tiny = 500gp Small = 5,000gp Medium = 50,000 Large = 500,000 Huge = 5,000,000 Gargantuan = 50,000,000. If the target of the spell is a captured soul you forgo the need for material components and the spell succeeds automatically. Imprisoned souls cannot be revived while imprisoned.

Until the spell ends, the target is also affected by one of the following effects of your choice:

Burial. The target is entombed beneath the earth in a hollow globe of magical force that is just large enough to contain the target. Nothing can pass into or out of the globe.

Chaining. Chains firmly rooted in the ground hold the target in place. The target has the Restrained condition and can’t be moved by any means.

Hedged Prison. The target is trapped in a demiplane that is warded against teleportation and planar travel. The demiplane is your choice of a labyrinth, a cage, a tower, or the like.

Minimus Containment. The target becomes 1 inch tall and is trapped inside an indestructible gemstone or a similar object. Light can pass through the gemstone (allowing the target to see out and other creatures to see in), but nothing else can pass through by any means. If the caster of this spell is a Lich and the target is a soul, the caster can trap the soul within one of their phylacteries using Minimus Containment. A soul trapped this way is converted into fuel for the lich and is thus forever lost. 

Slumber. The target has the Unconscious condition and can’t be awoken.

Ending the Spell. When you cast the spell, specify a trigger that will end it. The trigger can be as simple or as elaborate as you choose, but the DM must agree that it has a high likelihood of happening at some point. The trigger must be an observable action, such as someone making a particular offering at the temple of your god, saving your true love, or defeating a specific monster.

A Dispel Magic spell can end the spell only if it is cast with a level 9 spell slot, targeting either the prison or the component used to create it.