Lady Shiva

As Lady Shiva enters the battlefield, choose Vigilante or Villain. Lady Shiva gains that creature type.
First strike.
Ninjutsu {3}{u/b} (Return an unblocked attacking creature you control to your hand. Reveal this card and place it onto the battlefield attacking in the returned creature's place.)
Creature cards in your hand have ninjutsu. Their ninjutsu cost is equal to their converted mana cost.