Here are weekend Arena Chances codes of Feb 16 and Feb 17 for all players:
Code of Saturday: 6ayx, 5 Arena Chances, expiration Feb 17th 23:59:59 PST.
Code of Sunday: uowb, 5 Arena Chances, expiration Feb 17th 23:59:59 PST.
Before you use the codes please click Arena to check how many chances you’ve got, if you fail to get extra chances after using the above codes, please contact CS help. Please make sure you use the codes before the expiration.