Astral Cataclysm

You channel the raw power of the cosmos, unleashing a cataclysmic explosion of astral energy in a 60-foot radius sphere centered on yourself. Each creature within the area must make an Intelligence saving throw. On a failed save, a creature takes 10d10 force damage and is knocked prone. On a successful save, a creature takes half damage and isn't knocked prone.

The area affected by Astral Cataclysm becomes charged with residual astral energy for 1 minute, causing it to become difficult terrain and granting advantage on saving throws against being charmed or frightened while within it.

Casting this spell at 8th level or higher delas an extra 4d10 force damage per level abve 7th.