Astral Tempest

Portals from the Astral plane invade a spherical area centered on you, which has a 30-foot radius. The portals flash momentarily in and out of existence, crackling with magical energy and producing dim light within the area. The area moves with you for the duration.

When you cast the spell, choose a creature within the area. That creature is enveloped by an Astral portal and teleported to an unoccupied space of your choosing that you can see within the area. That space must not be in mid-air. The creature must then make a Dexterity saving throw as the portal violently shunts them back out of the Astral plane. On a failed save, the creature takes 2d8 lightning damage and falls prone. On a successful save, the creature takes half as much damage and does not fall prone. A creature may choose to fail their save. On each of your turns until the spell ends, you can use your bonus action to target another creature with the same effect.

In addition, if you choose yourself instead of another creature, you make no saving throw and do not take damage, nor do you fall prone.

At Higher Levels. When you cast this spell using a spell slot of 4th or higher level, for each slot level above 3rd, the damage increases by 1d8, and you may choose an additional creature when you first cast the spell and when you repeat the spell's effects on later turns.