"It was intended as a lesson, since he believed us indifferent to the stakes."

Wrathion turns his gaze back out toward the sea, thoughtful.

"Would you have acted differently? Having seen this."

Would he have killed Rigarda, instead of handing her over? Does the sight of what the undead here are capable of change anything for Anduin? Surely he is quite aware of the consequences. The scourge, Sylvanas Windrunner and her use of Blight -- they are all things known within Azeroth. Yet perhaps seeing it here is different, seeing it is not better than they feared. Not perhaps some mild uprising, but true destruction.