Cosmic Apocalyse

You unleash a catastrophic surge of cosmic energy that tears through reality itself. Choose a point within range; a rift opens in a 60-foot radius, releasing overwhelming chaotic energy. Each creature in the area must make a Constitution saving throw. On a failed save, a creature takes 12d6 force damage and is stunned for 1 minute. On a successful save, it takes half damage and is not stunned. The chaotic nature of the spell causes reality to become unstable; roll a d6 at the end of your turn. On a 1-2, the rift continues to surge, dealing 6d6 force damage to all creatures, including yourself, in the area.

Reality Rip (additional effect): The area around the rift becomes unstable, causing random reality distortions. Roll a d6 each round for 1 minute. On a 1-2, a random chaotic effect occurs, such as the temporary appearance of eldritch creatures or disturbances in space-time that cause unpredictable effects.