Ahlema, False Goddess

Indestructible, lifelink.
As long as Ahlema, False Goddess is on the battlefield you can't lose the game.
When Ahlema, False Goddess dies, discard
your hand.
When Ahlema, False Goddess is in your graveyard, exile your graveyard.
{4}{w/b}{w/b}: Exile target creature or planeswalker.