"Prepare yourselves, the bells have tolled! Shelter your weak, your young and your old! Each of you shall pay the final sum! Cry for mercy; the reckoning has come!" ~ Headless Horseman (his battle-cry)
"Harken, cur! Tis you I spurn! Now feel... the burn!" ~ Headless Horseman (yelled whenever he is about to attack a random victim with a flaming pumpkin)
The Headless Horseman is a seasonal boss from the popular MMORPG World Of Warcraft, he can only be faced during the event known as Hallow's End (the equivelent to the real world Halloween).
The tormented spirit of a former hero turned mad the Headless Horseman comes in two forms, his true-form: which resides in the Scarlet Monastery and his Shade - which is freeroaming and significantly weaker, both forms of the Headless Horseman must be defeated by the heroes of both the Alliance and the Horde to stop his endless terror during the time of Hallow's End
Shade Of The Headless Horseman
The Shade Of The Headless Horseman is the weaker form of the mad spirit and also the part of him that is free to roam across the lands of Azoreth - over the course of Hallow's End this shade continually attacks Alliance and Horde settlements, flying across them on his spectral mount and tossing flaming pumpkins at buildings to set them ablaze while also randomly throwing these deadly projectiles at any foolish enough to be in his line of fire.
The shade's attacks have become so regular that every year heroes are gathered to perform fire-fighting tasks, extinguishing the spirit's destructive handiwork - yet inevitably this brings the Headless Horseman's wrath upon them and should they succeed in extinguishing all the fires the Shade will descend and begin to attack, thankfully the Shade tends to be a fairly easy fight.
The Headless Horseman (True Form)
Sadly the same can not be said for the Headless Horseman's true form, imprisoned within the Pumpkin Shrine in the Scarlet Monastery this form is much more powerful and houses the Headless Horseman's true power - in order to truly stop the continual attacks on Azeroth's settlements brave adventurers must make their way to the Shrine and summon the fearsome spirit, who has a collection of dangerous abilities by which to vex even experienced warriors.