You can use an action to speak the horn's command word and then blow the horn, which emits a thunderous blast in a 30-foot cone that is audible 600 feet away. Each creature in the cone must make a DC 15 Constitution saving throw. On a failed save, a creature takes 5d6 thunder damage and is deafened for 1 minute. On a successful save, a creature takes half as much damage and isn't deafened. Creatures and objects made of glass or crystal have disadvantage on the saving throw and take 10d6 thunder damage instead of 5d6.

Each use of the horn's magic has a 20% chance of causing the horn to explode. The explosion deals 10d6 fire damage to the blower and destroys the horn.

If you have proficiency with a given musical instrument, you can add your proficiency bonus to any ability checks you make to play music with the instrument. A bard can use a musical instrument as a spellcasting focus. Each type of musical instrument requires a separate proficiency.

You can take a Magic action to blow the horn, which emits a thunderous blast in a 30-foot Cone [Area of Effect] that is audible out to 600 feet. Each creature in the Cone [Area of Effect] makes a DC 15 Constitution saving throw. On a failed save, a creature takes 5d8 Thunder damage and has the Deafened condition for 1 minute. On a successful save, a creature takes half as much damage only. Glass or crystal objects in the Cone [Area of Effect] that aren't being worn or carried take 10d8 Thunder damage.

Each use of the horn's magic has a 20% chance of causing the horn to explode. The explosion deals 10d6 Force damage to the user and destroys the horn.

If you have proficiency with a tool, add your Proficiency to any ability check you make that uses the tool. If you have proficiency in a skill that's used with that check, you have Advantage on the check too.