"Look, child, at the many colours of magic; see its patina, witness the haze of power. Elves and Lizardmen think themselves higher beings. But the truth is no matter what colour they use, it is all power that comes from my master."
- —Sarthorael the Ever-Watcher[2]

Sarthorael the Ever-Watcher, Lord of Change of Tzeentch, rendered for Total War: Warhammer.
Sarthorael, called the "Ever-Watcher," is a Greater Daemon of Chaos. Spoken of for many ages, this Lord of Change is favoured by Tzeentch himself and fulfils his master's dark, malicious purpose.[1]
The Changer of Ways sometimes sends the Ever-Watcher forth from the Realm of Chaos so that he might test those Chaos Champions who seek to bring about the End Times to determine if they are truly worthy of the Ruinous Powers' favour and support in their quest.[1]
Quick Answers
What is the role of Sarthorael the Ever-Watcher in the Chaos hierarchy?
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What kind of power does Sarthorael the Ever-Watcher possess?
History[]

The Lord of Change Sarthorael the Ever-Watcher is summoned from the Realm of Chaos by the will of Tzeentch to test those Champions of Chaos who would seek to bring about the End Times and the destruction of the mortal world.
Although no Daemon's True Name can ever be fully grasped by the mind of mortals, there has been talk for aeons of the one called "Sarthorael." Like all Lords of Change, the Ever-Watcher revels in his contriving and devious nature, hiding his true manipulative genius behind a screen of erratic and fickle behaviour. Yet Sarthorael is more than a mere Lord of Change -- he is one of Tzeentch's favoured, sent to spread mayhem to those that the Great Changer deems deserving.[1]

The heraldry of Sarthorael's Watchers, the Lord of Change's Tzeentchian army, as displayed in Total War: Warhammer III.[2]
Whilst the world of mortals should tremble when a Lord of Change appears before them, so too should even Daemons be wary, for Tzeentch does not discriminate -- all are fair targets in his game. And so Sarthorael is sent, watching and waiting, with all the craft and slyness of his master, to judge whether the End Times can really be brought about and, when the time is right, to see if those who stand upon the Chaos Wastes really have the strength to do it...[1]
Trivia[]
Sarthorael also exists in the Warhammer 40,000 setting, appearing in the novel Pawns of Chaos by Brian Craig, where the circumstances for his summoning by (and eventual taking over of) his Human host mirror that of the Advisor's.
Sources[]
- 1: Total War: Warhammer (PC Game)
- 2: Total War: Warhammer III (PC Game)