I just figured out what ilgynoth was talking about in emerald nightmare.
"At the hour of her third death she will usher in our coming."
Ion has no gender, he is sylvanas and n'zoth at the same time.
"The king of diamonds has been made a pawn."
Ion is the king of diamonds and immense wealth.
"Flesh is his gift. He is your true creator."
Ion created void elves and isn't giving us high elves, we need to appreciate the fact he created us.
"To find him, drown yourself in the circle of stars."
Circle of stars = popular blizzard employees, he eventually made his way to the top, so to find him you have to go to blizzard HQ.
"The lord of ravens will turn the key."
Raven = Bird = Pepe, ion is the lord of pepe.
"The boy-king serves at the master's table. Three lies will he offer you."
Boy-king = Ion, master = blizzard. Ion is known for telling lies.
First Lie: Patch 6.1 is a major content patch
Second Lie: High Elves are Blood Elves
Third Lie: Horde is morally grey
"Her heart is a crater, and we have filled it."
This is when ion transforms back into sylvanas
"Five keys to open our way. Five torches to light our path."
First Key: High elves
Second key: the Horde
Third Key: the alliance
Fourth Key: Warlords of Draenor
Fifth and final key: Lore (the CM)
SYLVANAS = ION = NZOTH