Aversa, Shadowgifted

Flying, first strike, lifelink
At the beginning of your end step, if you both own and control Aversa, Shadowgifted and a creature named Validar, Grimleal Heirophant, exile them, then meld them into Deadlords, Servants of the Fell Dragon.
Once a normal girl, her altered memories now compel her to fight for her "father," Validar's, cause.