History of the Forgotten Realms

The Battle of the Cold Vale
The half-drow Doum’wielle Armgo, disguised as an elf and an envoy from the Moonwood, convinces Bromm, one of the twin kings of Citadel Adbar to travel to the Moonwood. Bromm and his entourage of dwarves are ambushed by drow, lead by Tiago Baenre and the white dragon Arauthator. Tiago kills and beheads Bromm.