Naxxus, Great Death's Reef

Haste, hexproof
If this card wasn't countered, put all sharks in
your hand onto the battlefield without paying
their mana cost. Untap all creatures you control.
Whenever a creature enters the battlefield under
an opponents' control with power 3 or less, put
that creature under your control. It becomes a
4/3 Shark Pirate and loses all other effects.