Boneyard/1.03.24

Undead
As well as producing a typical siege weapon, the Undead smithy equivalent also researches weapon and armor upgrades. The Bone Catapult may seem worthless in the hand of the Undead, and their weapon and damage upgrades are few, but the most important use of the Boneyard is that it is required to morph Skeletons into Wights. And, of course, without Wights, there could be no Slayer Knights or Doom Knights nor Liches! To loose the Boneyard to enemy fire is to loose a vital part of your army.