The Horseman's Horrific Helmet

The Horseman's Horrific Helmet is an plate head armor. This is the Headless Horseman's head gear. It has a natural fiery green armor glow.

Source
This item drops from the Headless Horseman in Scarlet Monastery.

Macro fun
A fun Macro that makes use of the "USE" function of the helm. Right-click to equipt (if needed) left-click to activate.

/equip [btn:2] The Horseman's Horrific Helm /stopmacro [btn:2] /y Haa ha ha ha ha ha ha ha haaaa! /use The Horseman's Horrific Helm
 * 1) showtooltip The Horseman's Horrific Helm