Mo Fei thought to himself that there was more to these words than met the eye.
Aidan (Prince of Altland): "What do you mean?"
Wang Xuan (Divine Envoy): "You know the role that Deathwing plays in the plot, don't you?"
Mo Fei nodded.
The plot involving Deathwing can be briefly summarized in a few sentences.
In the early stages, he infiltrates the Alliance, secretly arranges conspiracies, colludes with the Horde, with the intention of overthrowing the Alliance.
In the middle stages, he's exposed, faces direct confrontation with the Righteous Faction, is defeated, and flees into hiding.
In the later stages, he gradually succumbs to madness, initiates the End of the World, intending to destroy everything.
In the end, he is slain by heroes who band together, bringing his wicked life to an end.