You speak lilting tones that convey judgment as you hold out a sunstone.

An ephemeral ball with a diameter of 30cm appears in an area within range, yielding bright light in a radius of 10m, and dim light for another 10m.

When the ball appears, and at the start of each of your turns, it emits a flash of brilliant sunlight out to a radius of 20m. Each hostile creature in that light must make a Constitution saving throw, taking 11d6 Holy damage and are potentially

Blinded

Prone

Undead and Amorphs have Disadvantage on this saving throw.

Critical Success (+10). The target is unaffected.
Success. The target takes half damage.
Failure. The target takes full damage and is Blinded for 1 minute and knocked Prone. A creature Blinded by this spell can make another Constitution saving throw at the end of each of its turns, removing the blindness on a successful save.
Critical Failure (–10). As failure, except the target takes 1.5× damage.