Midnight Yeti is one of the three skins released under the monthly Dark Dimension Zone offer. It could be individually purchased with game coins in early September 2018.
Midnight Yeti could be purchased in the Skins Shop under the ‘Dark Zone’ tab for 690 coins. This skin was available for a limited time and may not be available for purchase in the future.
Details of this skin may vary depending on location, platform or time.