It's not what you think.
How many of these existential disasters can one world face? Was it not recently that we were told time-traveling orcs were coming to kill us all? Were we not told that an evil ice-man from the north was sending his undead thralls after us?
What you see in the sky is nothing but an illusion. Think about it: we all know that the so-called "Cataclysm" was a conspiracy involving earthquake machines and an elaborate dragon-puppeteering device piloted by centaur and worgen. If it was so easy for the leaders of the Horde and the Alliance to fool us, it is probably the simplest thing to make us believe this new threat appeared in our sky.
The true threat to Azeroth is the same as it always was: treants. Those stupid little tree things are waiting for us to let down our guard. Right now they are massing their numbers while our greatest champions are hunting fruitlessly for this so-called "demon invasion."
Get your axes and woodchippers ready, because they are coming.
Warning: Portals to Outland.
The Kirin Tor has received reports of master magi selling portals to Outland as a way to escape the Legion. Most of these "masters" are actually apprentices looking for money to pay off student loans, and their portals are highly unstable.
Be aware that these improperly crafted portals can cause many unsettling effects. Come out on the other side, and you might find your body parts rearranged. Orifices in unexpected places. Noses growing out of belly buttons. Toe-hands and finger-feet. And those are the most benign side effects to expect.
If you see anyone selling portals to Outland, please avoid them.
An Emerald Dawn.
An emerald sun dawns in the vault of the heavens, but casts no shadow.
The world lifts her voice in terror, but only one can hear her cries.
From the space that is everywhere and nowhere, the crooked serpent feasts on stars.
It has no eyes to see, but it dreams of infinite endings and beginnings.
<Strange glyphs and writing in an unknown language cover the rest of the scroll.>