Frosthorn Rune

This massive horn is carved from the petrified bone of a frost titan, its surface etched with ancient Jotunn runes that pulse with a faint, crystalline blue light. The bone feels as cold as a glacier to the touch, and a constant, swirling vapor leaks from its silver-rimmed bell. When a storm approaches, the horn emits a low, melodic vibration that resonates with the sound of distant thunder.