Possible reference to Arthas from Warcraft III and World of Warcraft. He is also quite hard to defeat due to his high life and damage lowering effect. He has two attacks one being he does a one hit scimitar hit and the seconded being like the black axes special but shades of blue than black doing 3 hits. It is impossible to deal damage to him unless you can hit over 12 and sometimes higher for different levels. He will drop the Permafrost scimitar, of which variants of can be purchased from a shop that appears after his defeat.