Complex sentence: Instead of raising only skeletons, Necromancers can now raise any Necropolis unit provided they can pay enough Dark Energy and suitable corpses are available-for instance, Bone Dragons can only be raised from slain Dragons.
Split into simpler sentences: Instead of raising only skeletons, Necromancers can now raise any Necropolis unit provided they can pay enough Dark Energy and suitable corpses are available. The dark energy is renewed every first day of the week.For instance, Bone Dragons can only be raised from slain Dragons.