The Wretched Wraith is the boss of The Minecraft DLC: Creeping Winter.
It is very, very similar to the wraith, except with a few differences, It is a boss, It has a Orb Of Dominance Shard on its crown, It has a crown, Has a purple coat instead of a blue one, it also has frozen fists.
It only summons a few strays and wraiths at a time, It also has 3 attacks.