Ice Lord is one of the three skins released under the Kingdom of Wolves part of the Winter offer. It could be purchased as part of an item deal in mid November 2017.
Ice Lord could be purchased for $19.99 in a deal that included the Dire Wolf skin and either 50000 coins (Browser) or 1800 DNA (Mobile). It was not available for individual purchase and may not be available for purchase in the future.
Details of this offer may vary depending on location and platform.