Maestro, Titan of Dead Deals

When Maestro enters the battlefield, sacrifice
it unless it escaped.
Whenever Maestro enters the battlefield or
attacks, sacrifice target non-legendary
creature and search your library for creature
card with converted mana cost 3 or less and
put it onto the battlefield and target player
discard a card. If they can't you gain 5 life.
Escape -{w}{w}{b}{b}, Exile five other
cards from your graveyard.