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Secret Society: Assassin Brotherhood

This mod provides a new secret society, Assassin Brotherhood. GS and Ethiopia Pack are required, and the new Secret Society only appears under GS ruleset.

Please give me a thumb if you find this mod interesting!

The idea comes from the game series "Assassin's Creed".

    
• Governor Promotions:
  Assassin Apprentice:
  Unlocked by discovering a Tribal Village. Grants an Assassin unit in your Capital. Reveals the Eden Piece resource on the map. Allows your Assassin to construct Eden Piece Suppress improvement. Allows you to construct the Assassin Branch building, a powerful replacement of the Monument.
  
  Hidden Blade:
  Unlocked in Medieval Era. Grants an Assassin unit in your Capital. Unlocks the Assassin unit (Production and Gold both work). Unlocks the "Shroud of Eden" unit (Production and Gold both work). Newly trained Spies gain the "Cat Burglar" promotion.
  
  Master Assassin:
  Unlocked in Industrial Era. Grants an Assassin unit in your Capital. Allows you to construct "the Eye" building. +1 Spy capacity. Your Spy level is increased by 1 for offensive operations. Spies gain "Informant" ability (provide Combat Strength for Assassins).
  
  Mentor:
  Unlocked in Atomic Era. Grants an Assassin unit in your Capital. +1 Spy capacity. Unlocks Starting global aurora borealis device, a city project that provides Science while active, and upon completion speeds up your Exoplanet Expedition by +1 Light Year per turn, but generates CO2 and increases the probability of natural disasters.
  
  
• Eden Piece:
  Unique bonus resource, +1 Faith, revealed by Iron Working. Available improvements include Farm, Mine and Eden Piece Suppress and so on. Eden Pieces (that are not improved) cause damage to units on the tile (-10 per turn， but not fatal).
  
  
• Eden Piece Suppress:
  Improvement unique to the Assassin Brotherhood，can only be built by Assassins. +2 Faith to adjacent tiles.+2 Food to adjacent tiles after researching Irrigation.+2 Gold to adjacent tiles after researching Currency.+2 Production to adjacent tiles after discovering Theology.+2 Culture to adjacent tiles after discovering the Enlightment. +2 Science to adjacent tiles after researching Scientific Theory.+1 Appeal. Can only be built on Eden Piece Resource. Can be built outside the territory. This tile cannot be worked.
  
  
• Assassin:
  Combat unit unique to the Assassin Brotherhood. Has base Combat Strength equal to the strongest unit your cities have produced. Has unique skill tree. Invisible to most units. Reveal stealth units on the map within sight range. Can construct Eden Piece Suppress improvement. Gain "Fury of the Bloodline" ability when entering tiles adjacent to Eden Piece Suppress. Immune to damage caused by Eden Piece (that not improved).
  
  
• Shroud of Eden:
  Support unit unique to the Assassin Brotherhood. Can heal adjacent units, but units on same tile will be killed directly.
  
      
• Assassin Branch:
  Unique to the Assassin Brotherhood, replaces the Monument. +1 Culture, +1 Influence Points per turn. +1 universal slot. Provides +1 Loyalty per turn in this city. If the city already has maximum Loyalty, also provides an additional +1 Culture.
  
  Enemy Spy's level is reduced by 1 when targeting this city. If this city has Encampment, +1 GreatGeneral Point. If this city has Harbor, +1 GreatAdmiral Point.
  
  
• The Eye:
  Unique to the Assassin Brotherhood. Provides one more level of diplomatic visibility on all other civilizations. If this city has full power, it gets +100% adjacency from Campus and Industrial Zone, +10% Science. Can only build once. When constructed, permanently gain visibility within three tiles of all Eden Suppress improvements.
  
  
• Starting global aurora borealis device:
  A city project that provides Science while active, and upon completion speeds up your Exoplanet Expedition by +1 Light Year per turn, but generates CO2 and increases the probability of natural disasters.

UFO300, PPK, KCucumber and friends who give me suggestions

New building: Difference Engine


2022.12.06
Remake Assassin unit, now it has unique skill tree.
Adjust unit costs and govorner promotions.
Add bonus in spies. Adjust greatwork slot.
Now only Assassins can build unique improvement.
The function of "The Eye" now works for those improvements built after the building constructed.
Now this mod won't stop you from playing RF ruleset games (though new secret society is not avaliable in this situation).

2023.02.04
Fix some bugs.