Celestial Clarion

Raising your horn, you blow and invoke the sound of mighty celestial trumpets, the blast thundering forth and rattling everything in its wake.

Every creature in the area of the spell must make a Constitution saving throw: on a success, if it has hearing it must make another Constitution saving throw to maintain concentration on any spells it has cast; on a failure, creatures in the area of the spell take 2d8+spellcasting ability modifier Thunder damage and are deafened for one minute, and lose concentration on any spells they have cast if they have hearing, and loose unattended objects in the area of the spell that are made of crystal or glass shatter. Constructs and creatures that have the Echolocation trait have disadvantage on saving throws against this spell. The sound of the spell is clearly audible within three hundred feet, and loose unattended objects in this range weighing less than 5 lbs rattle and fall out of place.

When cast at a level above 4th, for every spell slot expended above 4th the spell deals an additional 1d8 Thunder damage, and the weight of loose and unattended objects affected by the spell increases by 1 pound.