You cannot get free Gems on Clash of Clans without a computer.
No
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No, you must have an internet connection to play Clash of Clans.
You will need to install the 'BlueStacks App Player' for PC and from there you will be able to play Clash of Clans on your PC
The clan is set to "Anyone Can Join"
eubie
No, Clash of Clans is not available for Nook.
There are no codes in clash of clans.
There is no "best" base in clash of clans.
Yes, but only if supercell gives them to you.
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YEs, you can donate spells in Clash of Clans