According to the Laughing God's will, the Harlequins take their places to act out their last, greatest performance -- or die in the attempt. Over the millennia, this masque's Players have overloaded the reactors of hive cities, plunged mighty spacecraft unshielded into the Warp, and even depopulated whole worlds, all in the name of the Laughing God's malicious amusement. The rune worn by the Reaper's Mirth is an ancient symbol that represents both the first blooding of a weapon and the last breath of an enemy. Known as the Theyldh, this process of becoming their "true" self is far more intense than anything experienced by any other performer in the galaxy.

These enigmatic warriors are often credited with supernatural powers, and many amongst both Asuryani and Drukhari society believe that the Harlequins know most, if not all, of the secret paths through the endless maze of the Webway. On Betalis III their holo-suits made them virtually invisible in the never-ending blizzards that dominate the Tormus Delta, enabling them to quickly bypass the Imperial defence lines. To alien observers there is no easy interpretation of this icon, but Aeldari know it represents the Midnight Sorrow's desire to strike their foe when daylight is slain, but before darkness reigns once more.The Laughing God is the only authority that the Harlequins recognise, and their every deed is thought to be in furtherance of his own inscrutable agenda.

Guided by the whispered words of their Shadowseers, the masque weaves a bloody path across the stars, seeking out the greatest enemies of the Aeldari. However it happens, once an Eldar becomes a Harlequin, every aspect of their old identity is erased. Finally, apply a matte or gloss varnish to protect the paintwork and give the models a finished look.Each joins a Light, Twilight, or Dark Troupe and assumes a new role at the direction of their Troupe Master. In battle, Harlequin Troupes move fast and hit hard, relying on speed and skill to annihilate the enemy before they even have time to raise their guns.