The Watchers Shall Return - Watcher Headcanon
After Avarosa’s Iceborn rebellion, the Watchers were cast into the Howling Abyss and believed to be defeated by all but Lissandra. The story is long and complicated, but we know that Lissandra, after murdering Avarosa and corrupting several Iceborn into the Frostguard, has set about preparing for the Watcher’s return.
But what if they...never left? What if they have been biding their time at the bottom of the Howling Abyss? Waiting...Trying to restore their power?
The Watchers never really left. They were simply weakened. They remain, to this day, at the bottom of the Howling Abyss, feeding off of magical artifacts and people in an attempt to restore their powers and their physical forms. We see this watcher shoot tendrils from its icy prison (black ice, perhaps?) and it doesn’t just try to kill him outright.
Its trying to drain him. The Watchers need a source of highly concentrated magical energy to regain their true forms after their defeat in Howling Abyss. Lissandra could be working to gather powerful artifacts (like the World Rune) to expedite their return.
From what we know about the Watchers, they had a physical form and a “void form”. All other images of the watchers look very similar to this. We know they were a cyclopean race with large horns, like this:
They haven’t been gone all this time...They’ve been waiting. Lissandra has been feeding them, and they’re growing beneath the tundra, biding their time to return.
May the gods help us when they do.
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((So this might not be a watcher, but that’s my personal take on it after watching the cinematic!))