Born From The Ash
The pulse came from the north-east, from the direction of the Singing Canyons, home to the Stone-Tail lizard folk, a reclusive species we had only recently made tentative contact with.
Scouts returned with grim news. A section of the canyon, a place the Stone-Tails called the "Harmony Spire" was vibrating itself apart. The unique, resonant stone of the spire, which usually emitted a low, stabilizing hum, was oscillating out of control.
The lizard folk were panicked; their entire culture was built on sonic architecture, and this was like watching their greatest cathedral scream itself to pieces.
It was a crisis of pure, unstable magic. A problem for shields and scalpels, not swords.