Buildings reference - every building, its unlock and its effect per level

Quick answer: every building has 30 levels except the Garrison Tent (1 level). The Castle unlocks the others, from Farms at Castle 1 to the Ethereon Tower at Castle 20. The tables below give each building’s main effect at levels 1, 5, 10, 20 and 30. The Upgrade window in game always shows the exact Current and Next Level values for your building.

General rules

• Castle cap. From level 3 on, a building can only be upgraded to a level no higher than your Castle. Most buildings also need one or two other buildings at a slightly lower level. The Upgrade window lists them under Requirements.
• Level 1 is free. Building a new building costs nothing; every upgrade after that costs resources (and gold for the Castle, Battle Hall, Bunker and Ethereon Tower from level 21).
• Plots. Farms, Stone Mines, Ore Mines and Lumber Mills use the 12 resource plots. Barracks, Infirmaries and Manors share the 16 military plots. Workshop, Embassy, Battle Hall, Prison, Shelter and Garrison Tent each have their own plot.
• Cannot be demolished: Workshop, Embassy, Battle Hall, Trading Post, Agora, Garrison Tent, Transmutation Lab and Bank.
• Effects that add a percentage (training speed, research speed, forge speed, Manor march size) stack with your other bonuses. See Boosts and how they stack.

Unlock and limits

Each line: when the building unlocks, how many you can have, and what it does.

• Castle: from the start, 1. Caps your other buildings and sets march size, heroes per army and march slots.
• Wall: from the start, 1. Castle defense: Wall HP and defense.
• Farm, Stone Mine, Ore Mine, Lumber Mill: Castle 1, 12 of each. Produce and store food, stone, ore and wood.
• Barracks: Castle 2, up to 100. Train troops.
• Vault: Castle 3, 1. Vault capacity.
• Workshop: Castle 4, 1. Forge castle equipment.
• Infirmary: Castle 5, up to 100. Hold and heal wounded troops.
• Manor: Castle 5, up to 5. Gold and a bigger march (Manor).
• Academy: Castle 6, 1. Research.
• Watch Tower: Castle 7, 1. Scout level.
• Shelter: Castle 8, 1. Shelter troops.
• Defi Market (Commerce): Castle 9, 1. Trade slots.
• Trading Post: Castle 9, 1. Send resources to allies (supply).
• Prison: Castle 10, 1. Hold captured leaders.
• Soul Sanctum: Castle 10, placed for you, 1. Souls and Soul Essence.
• Embassy: Castle 10, 1. Hold allied reinforcements.
• Garrison Tent: Castle 10 and Embassy 1, 1. Lets one ally camp an army outside your Wall (1 level only).
• Battle Hall: Castle 10, 1. Start rallies.
• Bunker: Castle 17, 1. Hide troops.
• Ethereon Tower: Castle 20, 1. Make Ethereon; holds the War Chest.

Core buildings

Level	Castle: troops per march	Castle: heroes per army	Castle: Max Help received
1	1,600	1	6
5	16,000	2	10
10	36,000	3	15
20	76,000	5	25
30	116,000	5	35

Level	Wall: HP	Wall: defense
1	1,000	100
5	2,441	207
10	7,451	516
20	69,389	3,195
30	646,235	19,781

The Castle also adds a march slot at levels 8, 15, 22 and 29 (1 slot at the start, 5 at level 29). Heroes per army goes up by one every 4 Castle levels (2 at level 5, 3 at 9, 4 at 13, 5 at 17). The Wall repairs itself fully in about 24 hours. Details: How many troops can I send?.

Resource buildings

Farm, Stone Mine, Ore Mine and Lumber Mill make the same amount per hour. The Manor makes the same amount as gold.

Level	Production per hour	Storage added	Manor: Max Army Size
1	100	1,000	+0.67%
5	222	2,215	+3.33%
10	599	5,987	+6.67%
20	4,374	43,736	+13.33%
30	31,947	319,474	+20%

The Manor also adds gold storage, the same amounts as a Farm adds food storage. See Manor.

Military buildings

Level	Barracks: training capacity	Barracks: training speed	Infirmary: capacity
1	40	+1.5%	1,000
5	320	+7.5%	4,500
10	1,120	+15%	12,000
20	2,720	+30%	27,000
30	4,320	+45%	42,000

Level	Battle Hall: rally size	Embassy: allied troops	Embassy: help slots
1	20,000	5,000	5
5	160,000	50,000	7
10	260,000	112,500	9
20	800,000	350,000	14
30	2,500,000	1,500,000	19

Level	Watch Tower: scout level	Bunker: troops hidden	Shelter: troops sheltered
1	1	500	500
5	2	1,037	1,200
10	4	2,580	3,600
20	7	15,974	33,000
30	10	98,907	300,000

Level	Prison: leaders held	Prison: execution wait cut
1	1	15 min
5	1	4 h
10	2	14 h
20	3	34 h
30	5	54 h

Barracks and Infirmary values are per building: two level 10 Infirmaries hold 24,000 wounded troops. Rally size is the Battle Hall’s Max Coalition Army Size. See Troops, training and healing and Prison and shelter.

Economy and support buildings

Level	Vault capacity
1	5,000
5	14,281
10	53,022
20	730,960
30	10,076,906

Level	Workshop forging speed	Academy research speed
1	+4%	+2%
5	+8%	+10%
10	+13%	+20%
20	+23%	+40%
30	+33%	+60%

Level	Defi Market: trade slots	Trading Post: supply capacity	Trading Post: supply tax
1	1	10,000	30%
5	2	75,000	26%
10	4	275,000	22%
20	7	1,650,000	14%
30	10	3,600,000	5%

Level	Soul Sanctum: soul capacity	Soul Sanctum: Soul Essence per hour	Ethereon Tower: Ethereon per day
1	1,000	10	1
5	5,000	50	4
10	10,000	100	21
20	20,000	200	598
30	30,000	300	17,287

The Soul Sanctum is placed for you when your Castle reaches level 10; you do not build it.

The tax in the table is the base rate for your Trading Post level. The Trading Post window shows the tax you actually pay.

The Bank is open to every player. You do not build it: it is placed in your city for you. See Bank.

Not available yet

The Transmutation Lab, the Agora market and Wall traps are switched off in the production game. You cannot build or use them yet.

If something goes wrong

• “Requires Castle level N.” Upgrade your Castle first.
• “Limit reached! No more buildings of this type allowed.” You own the maximum for that building (for example 5 Manors or 12 Farms).
• Requirements show Not Met. Upgrade the buildings listed in the Upgrade window. See Castle and buildings.