Achelois, the Stopper of Pain

Vigilance, Lifelink, Hexproof
When Achelois, the Stopper of Pain enters the battlefield scry 3, draw 3 card, and gain 3 life.
{3}{w}{u}, {t}: Exile Achelois, the Stopper of Pain and return it to the battlefield tapped.
{1}{w}{u}: Untap this creature.
"If you kill me the moon will not rise."