Yog-Sothoth, the Gate's Key

Shroud, Unblockable, Flying
{2}: Gain control of Yog-Sothoth, the Gate's Key,
any player may activate this ability at any time.
{p/c}{p/c}: Yog-Sothoth, the Gate's Key's controller
draws a card.
If Yog-Sothoth, the Gate's Key would leave the battlefield its owner may return it to their hand instead.
"It lumbers forward, leaving no trace but scorched and treaden sod." — Dr. Francis Morgan