5th-level Spell: Thunderous Chords

Aspetheurgy (Evocation)

You begin performing a song of crashing power, sending waves of devastating sound outwards from your instrument. A wave of sound rolls out from you in a 30-foot cone. Each creature in the area must make a Constitution saving throw. On a failed save, the creature takes 4d8 thunder damage, and is deafened and has disadvantage on its next attack roll until the start of your next turn. On a failed save, a creature takes half as much damage and suffers no other effects.
You can create such a sound wave as your action on any turn until the spell ends.
Source: SMS

• Casting Time: 1 action
• Range: Self (30-foot cone)
• Components: V, S, M (a musical instrument)
• Duration: Concentration, 1 minute
• Ritual: No