The Treachery of Tzeentch is an event exclusive to the Warriors of Chaos. It involves the Chaos Gathering, led by Sarthorael the Everwatcher, disputing Archaon's position as Everchosen.
This event substitutes the Chaos Invasion that occurs for all other factions.
Description
Treachery!
A Lord of Change, servant of the Chaos God Tzeentch, has emerged to challenge Archaon's position as the Everchosen.
How like Tzeentch this is! Not for nothing is he known as the Great Deceiver, the Changer of Ways. Ever does he seek to guide mortals along paths destined to increase his own power, showing favour to those who use cunning or influence to manipulate and control the world, and watching in delight as his conspiracies unfold. The Master of Subtlety, his plots are infinitely complex and interwoven. He is the principal architect of secret alliances between his brother Gods, and also the Lord of the Grand Betrayal.
Through his servant, he has guided your advancement, watching and waiting until the moment is ripe to make his own move and sweep the board clear. The Lord of Change is his pawn, with whom Tzeentch will chastise the Everchosen, thus giving the Great Deceiver pre-eminence over the other Dark Gods.
As the wearer of the Crown of Domination, anointed by all the Gods of Chaos, Archaon must withstand the Lord of Change's onslaught and fulfil his destiny as Lord of the End Times!