Shenubis, Land of the Eternal

{t}: Add {u} to your mana pool. Shenubis, Land of the Eternal does 1 damage to you
{t}{x}{u}: Sacrifice Shenubis, Land of the Eternal. Regenerage X target creatures.
{t}{x}{x}{x}: Sacrifice Shenubis, Land of the Eternal. Take X extra turns after this one. You loose two times X life.