Secret Moon's Zenith

Each other player Mills X. You Surveil X.
Then shuffle Secret Moon's Zenith into it's owner's library.
Transmute {x}{u}{b}
If transmuted Secret Moon's Zenith's converted mana cost is X+2.
If you Transmute Secret Moon's Zenith,
Cipher it, encoded on the creature with X being the X chosen for it's transmute cost.