Koujin Annihilation Wave

8th-level evocation

Casting Time: 1 action

Range: Self (60-foot cone)

Components: V, S, M (a fragment of a meteorite)

Duration: Instantaneous

You unleash a wave of raw, destructive energy in a 60-foot cone. Each creature in the area must make a Constitution saving throw. On a failed save, a creature takes 15d8 force damage and is knocked back 20 feet and stunned until the end of its next turn. On a successful save, a creature takes half as much damage and is not stunned. The energy leaves behind residual static, causing all spells cast within the area for 1 minute to require a Concentration check if the caster takes any damage.