This is my first mod and is for roleplay in ck2, you can raise troops if you collect enough necromancer power executing yours enemies in prision. If you have ideas do improve this mod feel free to use this mode as a sample and create a better mod.

Power System received from executions
tier = emperor -> necro_power value = 100 
tier = king -> necro_power value = 50 
tier = duke -> necro_power value = 25 
tier = count -> necro_power value = 10 
        else 
  necro_power value = 3 

sorry for my english