Champion's Trial is a two skin offer released for a limited time in December 2016. The skins in this offer could only be purchased with various packages of items. They were not available for individual purchased. There may be limited opportunity to acquire these skins in the future.
Note: The Champion's Trial offer was released again for a limited time in mid April 2019. The prices and items included were changed slightly. However, the included skins remained the same.
Details of this offer can vary depending on location, platform or time.