Sormexri, Artificial Angel

Flying, Hexproof, Affinity for artifacts
Whenever an artifact enters the battlefield under
your control, exile cards from the top of each
player's library equal to it's converted mana cost.
Then you may put any number of them into
their owners' graveyards.
When Sormexri deals combat damage to a player,
you may return target artifact from your
graveyard to your hand.