Bel's Damnation

You call upon the demon powers of Bel, former lord of Avernus. Choose 3 points within range that are 5 foot cubes. Columns of hellfire erupt from those points up to 15 feet in the air. Any creatures in those areas must make a Constitution saving throw or take 6d12 fire damage. They take half as much damage on a success.

Any creature that is at least half engulfed by the flame pillars must resist being dragged into hell by the grasping hands of the condemned. The creature must roll a Charisma saving throw or be dragged into Avernus temporarily. While a creature is trapped in Avernus, it can still take actions and bonus actions. At the end of the creature's turn, it takes 1d6 fire damage and can attempt another charisma saving throw to escape Avernus and return to where it had been when this spell was cast on it.

At higher levels: For each spell slot cast above 6th level, the initial burst of damage is increased by 1d12