Doppelgangers attack

After the PCs return with the last bird for Bab & Yaga the Doppelganger Dunes mercenaries will attack. They will subsequently occupy and steal the Central Island and transport it to the Sandwoods. The attack is way too large for the PCs and villagers to handle, they must evacuate. The PCs will be tasked with helping get Farmers back to the village so everyone can evacuate by the Bird houses. Bab and Yaga will frantically complete the Bird house as the villagers (including Merchants) try to stave off the attack whilst trying to evacuate.