Tier 1:

Dark Portal

Upgrades to: Dimension Gate, Demon Gate
Upgrades available: Backpack, Chaos Rising
Trains: Fel Peon, Hellbourne

Main building. Fel Peons can return Gold and Lumber to it. Also trains Hellbourne demons.


Moshpit

Upgrades available: Endless Rage, Fiendish Hounds
Trains: Mosher, Marauder, Slayer Cultist

Basic troop production building. Fel Peons can return lumber here.


Pig Farm

Produces food. Fel Peons can return lumber here.


Armoury

Upgrades available: Steel Weapons, Steel Armour, Chaotic Attack, Chaotic Carapace, Defensive Measures

Upgrades weapons and armour for Fel orc units and buildings. Requirement for some upgrades and abilities.


Fel Tower

upgrades to: Fel Guard Tower

Basic defensive building. Uses crippling magic to reduce enemy unit's attack- and movementspeed.

Fel Tower

upgrades to: Fel Guard Tower

Advanced defensive building. Uses crippling magic to reduce enemy unit's attack- and movementspeed and attacks land and air units.


Altar

Units available: Bloodknight, Farstrider, Priestess of the Sun, Arcane Mage

Trains and revives heroes.



Treasure Vault

Buildable shop. Contains various items depending on your tech level.

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Tier 2

Shredder

Trains: Infernal Cannons

Siege Workshop.

Cultist Circle

Upgrades available: Warlock Adept Training, Rogue Shaman Adept Training
Trains: Warlock, Rogue Shaman

Advanced production building, produces Fel Orc spellcasters.

Black Dragon Roost



Upgrades available: Burning Breath
Trains: Swifter, Black Dragon

Flyer building. Trains Swifters, which act as anti air and Black Dragons, a heavy air unit.