# Horn of Blasting *Wondrous item, instrument ([horn](/Rules/Source/items/horn-xphb.md)), rare*  You can take a [Magic](/Rules/Source/actions.md#Magic) action to blow the horn, which emits a thunderous blast in a 30-foot [Cone](/Rules/Source/variant-rules/cone-area-of-effect-xphb.md) that is audible out to 600 feet. Each creature in the [Cone](/Rules/Source/variant-rules/cone-area-of-effect-xphb.md) makes a DC 15 Constitution saving throw. On a failed save, a creature takes `dice:5d8|noform|noparens|avg` (`5d8`) Thunder damage and has the [Deafened](/Rules/Source/conditions.md#Deafened) condition for 1 minute. On a successful save, a creature takes half as much damage only. Glass or crystal objects in the [Cone](/Rules/Source/variant-rules/cone-area-of-effect-xphb.md) that aren't being worn or carried take `dice:10d8|noform|noparens|avg` (`10d8`) Thunder damage. Each use of the horn's magic has a 20 percent chance of causing the horn to explode. The explosion deals `dice:10d6|noform|noparens|avg` (`10d6`) Force damage to the user and destroys the horn. *Source: Dungeon Master's Guide (2024) p. 270. Available in the <span title='Systems Reference Document (5.2)'>SRD</span> and the Free Rules (2024)*