Population Migration / Travel
Abadun is force to evacuate due to the spreading evil.
The vile evil sends an undead army to attack Abadun. While they manage to hold out for a little while, the vast numbers of undead force all who can to evacuate the mighty capital of Zhakhzad. Most travel through underground tunnels to other Dwarven cities, and then over land to other parts of Albion. A few rich and powerful people escape by Airship, but this proves risky after an undead roc appears.