Akali, Rogue Assassin

Rebel Ninjutsu {2}{u}{b} ({2}{u}{b}, Return an
unblocked attacker an opponent controls to its
controller's hand: Put this card onto the opponent's battlefield from your hand tapped and attacking. this
card is considered to be on that opponent's battlefield
but controlled and owned by you.)
Perfect Execution-Whenever Akali deals combat
damage to an opponent or kills a creature, you
may return her to her owner's hand.