Void

You attempt to send one creature that you can see within range to the cold vastness of space. The target must succeed on a Charisma saving throw or be thrust into some unknown part of the cosmos.

The longer the target remains in the void the quicker they freeze to death. The target immediately takes 3d8 cold damage and they are incapacitated. On subsequent turns you must use your action to keep concentrating on the spell. For each round you concentrate on the spell the damage increases by a further 3d8. 1st: 3d8, 2nd: 6d8 and so on. This lasts for 1 minute (10 rounds), until the target dies or until your concentration is lost (through damage or choice).