Demiplane of Nightmares

You attempt to send one creature that you can see within range to a demiplane filled with their worst nightmares. The target must succeed on a Charisma saving throw or be banished there. While there, the target is incapacitated. If the spell ends before one minute has passed, the target reappears in the space it left or in the nearest unoccupied space if that space is occupied. If the spell ends by completing the full duration, the target reappears in the space it left or in the nearest unoccupied space if that space is occupied, with detrimental effects:

 

Until the end of the caster's next turn, the target cannot take reactions, has disadvantage on all attack rolls, and if it tries to cast a spell that forces a saving throw, that saving throw is made with advantage. Otherwise, the target is unaffected and returns without any detriments.