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To become an admin on Nanatsu no Taizai Wiki, you have to have an user account, and have been editing for over two months. You have to have over 2000 page edits. The edits have to be of good quality. Example: Deleting Periods, then Adding Periods, is not good quality. Also, while rearranging words and phrases are helpful, they do not help in choosing new admins.
To see if your eligible to make a request go here to check your Edit Count, by typing in your username and checking the main section.
How To Make RequestEdit
First, put you name besides a bullet point in the Current Request Section
Second, send a message to User:Roboartitec
Third, WAIT for a reply