Valaria Valar who was the sworn protector of Aegon the Conqueror and his two sister wives Visenya and Rhaenys was a Dragon Shifter. Valaria who was mated to Aegon was killed in 37 AC when Maegor the Cruel ordered for her to be drowned in BlackWater Bay. Since Aegon's Conquests no Valar has possessed the power to shift into a dragon. That was until Valaena Valar was born.