Savathun, Queen of the Hive

Deathtouch, Flying, Hexproof
When Savathun, Queen of the Hive enters the battlefield, you may pay {2}; search your library for a Hive creature, play it without paying its mana cost.
{6}{b}; Target creatures on your opponent's battlefield equal to the number of Hive creatures in your graveyard, exile target creatures.