I've just read the comics, and I think there are minor details that were extremely important.
When you have the chance to read (YouTube is the answer so far), you will understand how words have the weights I'm going to tell.
It's very clear to me that we were seduced by the overall description.
This comic is surely not showing, YET, what (WHO) will trigger the events of the game.
Without a doubt, The Amulet is the center piece of this plot. Comic konfirms this and trailer too.
But the Amulet now is worst than ever, because Shinnok is inside.
As I commented before, Raiden is very sure that the "demon" is corrupting the true nature of the Kamidaggers.
The relics, used to split the One Being, are being used for another purpose, as keys.
Ok, but the big info is what Raiden says about whatever is corrupting them.
He says: "Whoever corrupted the Kamidogu seeks to obtain the Amulet of Shinnok."
And then, on the scene showing Sub-Zero, the "demon" says "Blood is the path. The time of the Blood God is near".
Havik mentions to Reiko that he must kollect the Kamidogu to become the Blood God, and he knows where they are.
We could certaily think "Havik is corrupting the Kamidogu". But I don't see this way.
It's clear to me, so far, that Havik and Reiko want to strip Kotal Kahn's power but they are NOT controlling the blood magick. They are trying to acquire it.
And the "demon" talking to Sub-Zero is guiding him through the blood path/kode.
Havik is setting events to create chaos. That "tournament" on the island, just for chaos. Reiko as Emperor and god, just because he knows Reiko will be a brutal tyrant.
But the blood magick is an instrument for them: the corruption of the Kamidaggers seems to be something beyond their interests and focusing on The Amulet and the Blood God, the one Reiko wants to become.
Confusing, but that's what I understood.