Void

You sacrifice 30 hit points, which cannot be reduced by any means, and rip a void in space and time within range to un-fill a 20-foot radius sphere, which immediately collapses and closes. All creatures within the radius must succeed on a Strength saving throw to grab onto something connected to a non-movable surface or take 12d12 force damage. Creatures with no access to a grabbable object as specified, fail the save automatically.

On a successful save, the creatures take only half damage.

If a creature is reduced to 0 hit points from this spell, it is sucked into the starless void, leaving no remanent behind. The creature soul is lost forever and the creature cannot be revived by any means apart from divine intervention.