Matsuda, Daring Deputy

When Matsuda, Daring Deputy enters the
battlefield, draw a card.
When Matsuda attacks, target opponent reveals
the top card of their library. Flip a coin. If it
lands on heads, your opponent puts that card in
their graveyard. If it lands on tails, return
Matsuda to your hand.
"Or, do exactly what I just said not to." - L