Asking about rights for the use of the login animations

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Hi,I already posted on the creations & concepts board,but I can't seem to find it imma post here.. So I was wondering if I have the rights to use a login animation from League of Legends ( Kayn's login animation for example) in a steam application that is used for creating live backgrounds for your desktop. I have seen lots of league of legends backgrounds I was wondering if people asked for rights before publishing. Also I was wondering if I could get a 1080p version since the 720p looks quite horrible on a desktop :D _**(that is if i get the permission to use the login animation in the first place)**_ Thank you for taking your time to read this Cheers!
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