Freya, the Tiger's Shadow

Commander ninjutsu {b}{w} ({b}{w}, Return an unblocked attacker you control to hand: Put this
card onto the battlefield from your hand or the
command zone tapped and attacking.)
Whenever a Ninja you control deals combat
damage to a player, reveal the top card of
your library and put that card into your
hand. Each opponent loses life equal to that
card's mana value.