Excalibur is a three skin offer released for a limited time in March 2017. The designs of these skins are inspired by the legend of King Arthur. The Excalibur skins 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 Excalibur offer was released again for a limited time in early January 2019. The included skins and prices remained nearly the same.
Details of this offer can vary depending on location, platform or time.