Altairis

You create a powerful implosion at a point you can see within range. Each creature within a 20-foot radius sphere centered on that point must make a Strength saving throw. On a failed save, a creature takes 4d8 force damage and is pulled 10 feet towards the center of the implosion and is knocked prone. On a successful save, the creature takes half as much damage and isn't pulled.

If a creature is pulled into a space occupied by another creature, both creatures take an additional 2d8 force damage as they collide.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.