Paladin is one of the four skins released under the ‘Choose Your Role!’ part of the RPG Games offer. It was available for individual purchase using game coins in mid August 2017.
Paladin could be purchased in the Skins Shop under the ‘RPG Games’ tab for 2900 coins. It was available for a limited time and may not be available for purchase in the future.
Note: The RPG Games: Choose Your Role offer and the Paladin skin were released again for a limited time in late April 2018. The price for Paladin remained the same at 2900 coins.
Details of this offer can vary depending on location, platform or time.