The Blackthorn

Vigilance.
The Blackthorn attacks each combat if able.
When The Blackthorn attacks, each other
attacking creature gets +1/+1 and has
"{w}: untap this creature."
When The Blackthorn attacks, you may search
your library, hand, and graveyard for a card
named Oathbringer. If you do, exile it with
one time counter on it.