I used Oinkerwinkle's tools to create this, hopefully someone can make use of this XD
UPDATED
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Due to Popular demand, i switched the weapon to a large flaming scimitar.
PS: The flames on the scimitar don't look quite right in the model editor or the screen shot, it resembles the flames on the doom guards scimitar just so you have an idea.
Keywords:
skeleton, death knight, knight, skeletal, bones, undead, flaming skull horseman