Wizards of the Coast has announced Conspiracy, which it bills as “the first-ever multiplayer-focused booster set” and has mechanics that affect drafting itself, not just games of Magic.

Conspiracy introduces 65 new cards to Magic. Of those, 52 will be legal in Legacy and Vintage while thirteen will not.

Conspiracy was promoted first with a cipher-encrypted Magic Arcana. To read the full (decrypted) announcement, check out Friday’s Magic Arcana.