When you build a temple, you can purchase a deity for your civilization at the cost of 1000 piety. There are 4 different deities of which you can only choose one per reset.
If you do reset the game you may choose an additional deity after building the temple, and/or remove an old deity for another 1000 piety in return for gold (iconoclasm)
(The amount of the 3rd needed material increases on each purchase)
Deity of Battle
| Build Altar | 200 stone, 200 piety, 100 metal: +1 devotion | |
| 10d | Riddle of Steel* | 1000 piety: Improve soldiers |
| 20d | Smite Invaders | alotta stufff homieee :PPPPPPPPPPP |
| 30d | Throne of Skulls* | 1000 piety: Slaying enemies creates temples |
| 40d | For Glory! |
1000 piety: Temporarily makes raids more difficult, increases rewards |
| 50d | Lament of the Defeated* | 5000 piety: Successful raids delay future invasions |
Deity of Cats
| Build Altar | 200 stone, 200 piety, 100 herbs: +1 devotion | |
| 10d | Lure of Civilisation* | 1000 piety: increase chance to get cats |
| 20d | Pest Control | 100 piety: Give temporary boost to food production |
| 30d | Warmth of the Companion* | 1000 piety: cats help heal the sick |
| 40d | Grace | 1000 piety: Increase Happiness |
| 50d | Comfort of the Hearthfires* | 5000 piety: traders marginally more frequent |
Deity of Fields
| Build Altar | 500 food, 500 wood, 200 stone, 200 piety: +1 devotion | |
| 10d | Blessing of Abundance* | 1000 piety: increase farmer food output |
| 20d | Burn Wicker Man | 500 wood, 1 worker: random bonus to a resource |
| 30d | Abide No Waste* | 1000 piety: workers will eat corpses if there is no food left |
| 40d | Walk Behind The Rows | 1 worker per second: boost food production (on/off) |
| 50d | Stay with us* | 5000 piety: traders stay longer |
Deity of the Underworld
| Build Altar | 200 stone, 200 piety, 1 corpses: +1 devotion | |
| 10d | Book of the Dead* | 1000 piety: gain piety with deaths |
| 20d | Raise Dead | 100 piety per zombie |
| 30d | A Feast for Crows* | 1000 piety: corpses are less likely to cause illness |
| 40d | Summon Shades | 1000 piety: Souls of the defeated rise to fight for you |
| 50d | Secrets of the Tombs* | 5000 piety: graveyards increase cleric piety generation |
Pantheon Upgrades
Certain deity upgrades are added to your "Pantheon Upgrades" list, and are not lost if you reset your civilization. These upgrades are indicated above with an asterisk (*).
At the start of a new game (reset game), iconoclasm appears in the deity tab and costs per 1000 piety. This is considered the most useless upgrade in game as it eliminates all pantheon upgrades with a gold reward depending on devotion.
The deity of underworld is considered the easiest economically and for raiding as you can create zombies with corpses and 100 piety. These zombies have consistent prices, don't need food, houses and cannot get sick. One possible disadvantage is zombies will always have a happiness ranking of 'content' and may dilute the happiness, preventing blissfulness from being achieved