Removing the Special Rules: Originally was as follows:

"
Two special rules will be in in place for drafting this cube:
First, if you draft Coax from the Blind Eternities, you are allowed to include Emrakul, the Promised End in your sideboard (and only your sideboard) for the duration of the draft. Emrakul is too powerful to allow it to be drafted normally, so she's locked into blue and marked with a special ivory sleeve not shared by any other card in the cube so she can't be included in a deck (Tokens are blue, everything else is purple).

Second, treat Helvault as though it also has the text of Lore Seeker on it and allow its drafter to add an extra pack to the draft. Helvault is flavorful and important to the world, but a mediocre card, so there's special incentive to draft it now.
"