Twisty Staircase_hold

Choose a humanoid that you can see within range. The target must succeed on a Wisdom saving throw or be paralyzed for the duration. At the end of each of its turns, the target can make another Wisdom saving throw. On a success, the spell ends on the target.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can target one additional humanoid for each slot level above 2nd. The humanoids must be within 30 feet of each other when you target them.

OR

At 3rd level or higher, Twisty Staircase can cause 1 d6 psychic damage per failed constitution save, rather than add another target. For each level above third level, the player can choose to add another target or increase the psychic damage. For example, casting at a 5th level on 3 targets, who take 2 d6 damage per failed constitution save, or on 4 targets, all of whom take 1 d6 damage per failed constitution save for 1 minute.