Hagall the Reaver King

Your Hero's color identity includes your choice
of Black or Red.
Each creature spell you cast has blitz. The blitz
cost is equal to the spell's mana cost plus {1} for
each time you have blitzed a creature this turn.
Whenever a creature enters your graveyard from
the battlefield, you may return a creature with
lesser mana value from your graveyard to your
hand.