Masked Menace is one of the two skins released under the monthly Fantasy Portal offer. It could be individually purchased with game coins in late December 2018.
Masked Menace could be purchased in the Skins Shop under the 'Fantasy Portal' tab for 2900 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.