Flames of Madness
Emboldened by Thrumbolg, the fey kingdom of Nacmoran made a formal invasion of Durpar. A spellplague bomb was dropped into the capital city. The Beastlands actually interfered, but had to play their hand openly. The Beastlands offered Durpar two options: Assimilation or Death. They assimilated. Life continues in Durpar, but now the citizens are all the wiser about their true loyalties. It’s hollow, however, as Durpar practically no longer exists, and is much a Plagueland.