It's unusual for Wrathion to be struck silent. He loves to talk, after all. Anduin has always been of the opinion that the dragon was overly fond of his own voice.

In this case, however, Anduin would be forced to admit he wasn't even sure what he wanted him to say. He had apologised, in his own way. What else could he say that would satisfy him? Apologise again? Agree? Admit he was wrong?

None of that is, in truth, particularly in character for him. He takes being humbled poorly.

Anduin thinks a moment, then leans forward and touches a gentle hand to the side of Wrathion's large head.

"I don't want to be angry at you, but if we're going to work together here I need you to trust me."

Not to work around him, not to keep things from him.