Champion Trophy
In-game description
The mighty and fearless Demons cannot bother with petty trifles, they only care for greatness and power.
Affiliating yourself with the Demons faction will hugely improve the output of higher tier buildings.
Part of the Evil Vanilla Factions, the Demons are related to increasing production of highest tier buildings and have perks based on the amount of trophies unlocked. Their Bloodline, more used in late games, can become powerful for long reincarnations as it increases production based on total time spent being Evil.
Alignment: Evil
Unlock Requirements: None
All Vanilla Factions are enabled by default
Faction spell: Hellfire Blast
Effect: Increases the production of Evil Fortresses and Hell Portals.
Formula: (200 * x ^ 0.8), where x is your Trophies Unlocked stat.
Spell Trophy & Upgrade: 
Hell Rush
Requirements: Cast the Demon spell Hellfire Blast in the first 60 seconds of a playtime.
Effect: Hellfire Blast also boosts Halls of Legends.
Upgrade Cost: 1 M (1e6), A1+ Free
Tier 1 Upgrades
Demon Trade Treaty
Cost: 20 Demon Coins
Effect: Unlocks Demon Upgrades.
Torture Chambers
Cost: 50 M (5E7)
Effect: Increase the production of Evil Fortresses by 5% per assistants you own.
Devil Tyrant
Cost: 500 M (5E8)
Effect: Increase the production of the three highest tier buildings by 0.5% per Trophy
Evil Conquerors
Cost: 5 B (5E9)
Effect: Increase the production of all other buildings by 1.5% per Evil Fortresses you own.
Tier 2 Upgrades
Demon Friendship Pact
Cost: 100 Demon Coins
Effect: Unlocks more Demon Upgrades.
Lava Pits
Cost: 500 B (5E11)
Effect: Increase the base production of Evil Fortresses and Hell Portals by +200,000.
Demon Overseers
Cost: 5 T (5E12)
Effect: Increase the production of the three highest tier buildings by 0.5% per Trophy.
Demonic Presence
Cost: 50 T (5E13)
Effect: Increase the production of the two highest tier buildings by 0.2% for each Building you own.
Tier 3 Upgrades
Demon Alliance
Cost: 500 Demons Coins
Effect: Unlocks more Demon Upgrades.
Infernal Magic
Cost: 5 Qa (5E15)
Effect: Hell Portals also increase your mana regeneration rate.
Formula: (x ^ 0.325), where x is the number of Hell Portals you own.
Burning Legion
Cost: 50 Qa (5E16)
Effect: You gain assistants based on the amount of Hell Portals you own.
Formula: floor(sqrt(1 + 2.5 * x)-1), where x is the number of Hell Portals you own.
Very Bad Guys
Cost: 500 Qa (5E17)
Effect: Let Blood Frenzy target Hall of Legends and increase the production of Halls of Legends by +0.05% per trophy for each Evil Fortress and Hell Portal you own.
Demonic Heritage
Cost: 5000 Demon Coins
Requirements: Demon Champion Trophy
Effect: Increase the production of all buildings by 0.3% per Hall of Legends you own.
Demon Research Requirements
Infernal Realm Quest
Useless underling, be warned! The Demons are going to invade your world with all their might. If you know which side you want to be on when that happens, build those Hell Portals!
Requirement: R16 + 1500 Hell Portals
Cost: 10 Dtg (1E100)
Infernal Realm
Upgrade Hell Portals To Infernal Realms, boosting their production by 100% per Trophy you unlocked and unlocking more unique perks for the building.
Effect: +Access to the Research Facilities.
Requirements: Buy "Infernal Realm Quest"
Cost: 10 Ttg (1E103)
Strategy Room
Effect: Unlocks the Warfare research facility and increases Demon production by 100000%, plus an additional bonus based on Warfare research points.
Note: Required once throughout the entire game play and does not count towards the bought upgrade stat.
Requirements: All Demon faction upgrades bought, Infernal Realm.
Cost: 10 Notg (1e121) coins, 1 M (1e6) Demon coins
Unique Building
Upgraded from Hell Portals
At R16, the Demon's building Hell Portals can be upgraded to a Unique Building: Infernal Realm, which is required for some challenges and research quests.
Ascension 2 - R100+
Advanced Demonic Heritage
Cost: 1 Sp (1e24) Demon Coins
Requirements: Demon Master trophy and 8 hours activity time (This Game) of Hellfire Blast.
Effect: Increase the production of all buildings based on trophies unlocked.
Formula: (0.25 * x ^ 0.75)%, where x is amount of trophies unlocked.
Note: When using their lineage, Advanced Heritage powers are multiplied by the level of the lineage.
Formula: (1 + 0.3 * level)
Burning Abyss Quest
Cost: 1 Ud (1e36) Emerald Coins
Requirement: 120 seconds long Call to Arms.
Effect: Grants access to Unique Building.
Burning Abyss Unique Building Upgrade
Cost: 1 Td (1e42) Emerald Coin
Requirement: Burning Abyss Quest
Effect: Gives Burning Abyss Unique Building.
Unique Building
Upgrade Hall of Legends to Burning Abyss, boosting their production based on time spent as Evil and unlocking more unique perks for the building.
Effect: Increase production based on spent time as Evil.
Effect: Also grants access to Faction Union.
Formula: for each digit of floor(1.25 * x): sum(digit ^ (2 + (floor(log10(1 + 1.25 * x) + 1) / 10))% where x is evil time this R.
Effect: Grants access to Faction Union.
Demons Union
Cost: 1 Qi (1e18) Demon Coins
Requirement: Burning Abyss Unique Building
Effect Requirement: R111+
Effect: 1% of all Non-Evil spells cast in this game count as Evil.
Effect: Trophies count 100% more.
Effect: Grants access to Union Upgrade.
Abyssal Furnace
Cost: 1 Nod (1e60) Emerald Coins
Requirement: Demons Union
Effect: Increase the production of all buildings based on the amount of Burning Abysses you own. Higher tiers get better bonuses.
Formula: (0.5 * (t ^ 2) * (x ^ 0.5)), where x is Hall of legends count, t is building tier.
Demonic Fury
Cost: 100 Qivg (1e80) Emerald Coins
Requirement: Demons Union
Effect: Multiplicatively increase faction coin find chance based on least time spent between Evil and Chaos this R.
Formula: (0.25 * min(x,y) ^ 0.75), where x is evil time in seconds and y is chaos time in seconds.
Devastation
Cost: 100 Tg (1e95) Emerald Coins
Requirement: Demons Union
Effect: Increase production of three highest building tiers based on mana regen.
Formula: (4.5 * ln(1 + x) ^ 4.5), where x is mana regen.