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Humanity has declined - Fairy Queendom

Leader: Ms. Human
UA: City and specialist+2 production, happiness from Natural Wonder add by 3.
UU: The Fairies. Replaces worker, +1 move and ignore terrain cost, work rate +50%. Can be consumed to accelerate city's construction or build fairy tea party improvement. Also can be consumed to accelerate construction like GE.
UB: FairyCo. Replaces aqueduct. Provide extra food and has two engineer slots. Also dupulicate the luxuary city owned.

Credits:
Based on MOD made by "2B pencil for exam". Rewrote some codes to make it BNW compatible, translate it into English, add some art.

Notice this is a over powered civilization. Please leave a message if there are any bugs or you have some interesting ideas.
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2015.6.12 Update:
Fixed some bugs you guys mentioned, but I have some troubles uploading the mod to workshops. You can download the debuged version from the link below.
civ5mod file: https://www.dropbox.com/s/rhukxpn94na2e69/Humanity%20has%20declined%20-%20Fairy%20Queendom%20%28v%201%29.zip?dl=0