Horn of Blasting

Wondrous Item (Horn), Rare

You can take a

When you take the Magic action, you cast a spell that has a casting time of an action or use a feature or magic item that requires a Magic action to be activated.

If you cast a spell that has a casting time of 1 minute or longer, you must take the Magic action on each turn of that casting, and you must maintain Concentration while you do so. If your Concentration is broken, the spell fails, but you don't expend a spell slot. See also Concentration.

action to blow the horn, which emits a thunderous blast in a 30-foot

A Cone is an area of effect that extends in straight lines from a point of origin in a direction its creator chooses. A Cone's width at any point along its length is equal to that point's distance from the point of origin. For example, a Cone is 15 feet wide at a point along its length that is 15 feet from the point of origin. The effect that creates a Cone specifies its maximum length.

A Cone's point of origin isn't included in the area of effect unless its creator decides otherwise.

that is audible out to 600 feet. Each creature in the

A Cone is an area of effect that extends in straight lines from a point of origin in a direction its creator chooses. A Cone's width at any point along its length is equal to that point's distance from the point of origin. For example, a Cone is 15 feet wide at a point along its length that is 15 feet from the point of origin. The effect that creates a Cone specifies its maximum length.

A Cone's point of origin isn't included in the area of effect unless its creator decides otherwise.

makes a DC 15 Constitution saving throw. On a failed save, a creature takes 5d8 Thunder damage and has the

While you have the Deafened condition, you experience the following effect.

Can't Hear. You can't hear and automatically fail any ability check that requires hearing.

condition for 1 minute. On a successful save, a creature takes half as much damage only. Glass or crystal objects in the

A Cone is an area of effect that extends in straight lines from a point of origin in a direction its creator chooses. A Cone's width at any point along its length is equal to that point's distance from the point of origin. For example, a Cone is 15 feet wide at a point along its length that is 15 feet from the point of origin. The effect that creates a Cone specifies its maximum length.

A Cone's point of origin isn't included in the area of effect unless its creator decides otherwise.

that aren't being worn or carried take 10d8 Thunder damage.

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

Source: Dungeon Master's Guide, p. 270