Corrupted Realspace

Target: One Legiones Daemonica unit from your army that is within range of an objective marker you control
Effect: That objective marker is said to be Corrupted and remains under your control, even if you have no models within range of it, until your opponent controls it at the start or end of any turn. In addition, while an objective marker is Corrupted and under your control, the area of the battlefield within 6" of that objective marker is considered to be within your army’s Shadow of Chaos.