To do this, have the Siren Wonder unlocked. In this expansion, there is also a way to get skeleton villagers. If dropped around a populated area, it will kill anyone in its radius and make them a skeleton. Also, if dropped on a store house, it cause everything in it to multiply and make it full. If thrown on an undead army, it will destroy them. More buildings had been added like a blacksmith's shop and also a hospital as examples.
The expansion has the same gameplay as B&W2.
