The eyes of the four skulls begin to emit a green ghastly glow and they begin multiplying and dancing around the point of summoning. The iron bar begins to grow and hum and duplicate and joins the skulls. As the materials dance they begin grow and form a castle.

The castle has a 60 ft. high outer wall that is 120 ft. long and 120 ft. wide. Inside the wall a keep and any other structures can be created as long as they are contained within the wall and don't extend more the 120 ft. above or below the wall.

The wall can be any shape and have as many as 8 turrets. Each turret can contain a balista, a catapult, or elemental cannon. The castle is guarded by 80 undead creatures. The caster can choose any combination of skeletons, mummies, or zombies.