Yog-Sothoth

Vigilance, hexproof. Shadow
Yog-Sothoth power and toughness are equal to
the total power and toughness of creatures in the battlefield plus 1.
When Yog-Sothoth is put into a graveyard from anywhere, shuffle it into its owner's library.
Yog-Sothoth knows the gate. Yog-Sothoth is the gate.
Yog-Sothoth is the key and guardian of the gate. Past, present, future, all are one in Yog-Sothoth.