Fatal Dissonance

You emit a 15-foot cone of a sustained, ever-growing, shrill sound; creatures in the area must make a Constitution saving throw. On a failure, an affected creature takes 6d6 thunder damage and becomes Incapacitated for the duration of the spell, repeating the saving throw at the end of each of its turns to end this effect. On a success, it takes only half the damage. Creatures that enter this area or start their turns within it must make this same saving throw.

If a creature in the area has taken thunder damage within the last two rounds, on a failed save it takes vibrational damage instead of thunder. If a creature in the area has taken vibrational damage within the last two rounds, on a failed save it takes disruptive damage instead of thunder.

When the spell ends, if you maintained concentration for 3 rounds or more, you gain 1 level of Exhaustion.

At Higher Levels. When you cast this spell by spending Mana points equal to a 5th-level spell or higher, the damage increases by 2d6 and the cone increases by 5 feet for each spell level above 4th.