The Twin Tailed Comet is a comet with two tails which has been sighted on multiple occasions throughout history in the Warhammer World. The Twin Tailed Comet always heralds great or tumultuous events. It is unclear whether the comet is a single object whose orbit passes close to the Warhammer World on a regular cycle, or whether the comet(s) are separate objects which have been seen consecutively.
- 1st Comet marked the birth of Sigmar, roughly 2500 years before present.
- 2nd Comet marked the coming of Sotek and the victory of the Lizardmen over the Skaven
- 3rd Comet appeared over the city of Mordheim prior to its destruction at the hands of another Comet.
- 4th Comet heralded the coming of Valten of Lachenbad, who was seen as Sigmar's spiritual successor.
In Sigmarite theology, the Twin Tailed Comet represents destiny, fate, and the hand of Sigmar acting upon the world - especially Sigmar's Wrath manifesting against the city of Mordheim. Hence, the Twin Tailed Comet is a very popular symbol for religious Sigmarites, and is found on buildings, in religious mosaics and relics, on weapons and medals, and so forth.