Piscessa, the One of the Two

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Piscessa, the One of the Two enters the battlefield, create Piscescar, a legendary 5/4 green and blue Dragon creature token with flying. Exile Piscescar when Piscessa, the One of the
Two leaves the battlefield. Sacrifice Piscessa, the
One of the Two when Piscescar leaves the battlefield.