Infernal Loom

• The Infernal Loom increases number of gated creatures by 5%. Enemy heroes sieging this town get -2 to luck.
  

Cost: 1000g 2m 2s

Spawn of Chaos

• The Spawn of Chaos increase Horned Demon or Horned Overseer growth by +2 per week.
  

Cost: 1500g 5s

Halls of Horror

• The Halls of Horror increase Hell Charger or Nightmare production by +1 per week.
  

Cost: 1000g 5s

Sacrificial Pit

• Allows to sacrifice creatures at this building in exchange for extra experience.
  

Cost: 2000g 5c 5s 5g

Lord of Torments

• The Diety of Fire increases weekly creature growth by 50%, provides your empire with an additional 5000 gold each day and also provides an enormous boost to spell power for defending hero. Need Tear of Asha to build this structure.
  

Cost: 0