In a Chelskan mine, a few years ago, a device was unearthed. It looks like a metal ring, 6.7 meters in diameter, with nine blue-glass chevrons equidistantly placed, and 36 divsions.
One day, the device activates spontaneously - the divisions light up with symbols resembling constellation drawings (though they won't line up with any constellations seen from Chelska), and when all of them are glowing, the device erupts with a wave that will completely destroy everything in about a meter directly in front of it.