Aiarcs Detain

You attempt to detain one creature you can see in a pocket dimension of your own design. The target must succeed on a Charisma saving throw or be banished.

If the target fails then they are transported to a pocket dimension roughly twice the size of the creature itself, the content and design of the space is completely up to you but nothing in the pocket space can physically harm them, all sensory effects created within the space are illusioury. You can fill the space with a number of visuals, sounds or smells up to double your spellcasting ability modifier.  While there, the target is incapacitated. The target remains there until the spell ends, at which point the target reappears in the space it left or in the nearest unoccupied space if that space is occupied. If the spell ends before 1 minute has passed, the target reappears in the space it left or in the nearest unoccupied space if that space is occupied.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, you can target one additional creature for each slot level above 4th.