During the first Siege of Astrid, a halfling scout accidentally stumbled upon the lairs of the Yuan-Ti beneath Astrid Rock. He had been exploring the passages, in the hopes of finding a back way to the top, or some other advantage for the Beldin side. Before this intrusion, the Yuan-Ti had willfully ignored the warmbloods who were fighting overhead, but having been disturbed, they burst out suddenly upon both the Beldin army and the Aurilites. What resulted was a giant three way battle, which spilled out into the Aelfwood, and reached as far as Siluvan.
Queen Iris Jadys'Varine's parents were killed in this battle.