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Outdated Clash of Kings Private Mod Server Legacy 40.00.0

I already did and when I do I can't upgrade anything myself it tells me invalid operation
Here is proper tutorial

Upgrade castle
Build farm or maybe sawmill
Build Stables
Train
Build one more farm
Collect Quest reward
Build drill ground
Go to World and occupy farm
and go in castle and restart
 
We have made some changes :

Alliance science donations optimised.
World boss will no longer drop the shield.
World boss stamina requirement changed from 10 to 5
Daily points 300 instead of 200
Daily Keys and Other rewards in mail changed.
Daily Popularity Donations limit changed.
Some of the heroes skills are re-enabled.

More rewards will be changed later on !!!!