Elesh Norn, The Orthodox

Lifelink.
When Elesh Norn, The Orthodox enters the battlefield, exile all opponents' graveyards.
If a card would be put into one of your
opponents' graveyards, exile it instead.
Once each turn, you may cast a creature spell
with mana value 3 or less from your graveyard.
If you do, it gains "When this creature is leaves
the battlefield, exile it instead."