Ultra Beast Celesteela

Worm Hole — At the beginning of your upkeep,
you may exile Ultra Beast Celesteela from your
hand. At the beginning of combat on your turn
you may pay {1}{w}{u}. If you do, put Ultra Beast Celesteela from exile onto the battlefield under
your control tapped and attacking. Sacrifice it at
the end of combat.
When Ultra Beast Celesteela enters the battlefield, each creature you control gains flying
until end of turn.