Slithermuse

When this creature leaves the battlefield, choose an opponent. If that player has more cards in hand than you, draw cards equal to the difference.
Evoke {3}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

When Slithermuse leaves play, choose an opponent. If that player has more cards in hand than you, draw cards equal to the difference.
Evoke {3U} (You may play this spell for its evoke cost. If you do, it's sacrificed when it comes into play.)