(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it’s defeated, exile it, then cast it transformed.)

When Aerial Duel enters the battlefield, put a flying counter on up to four creatures you control. Each other player may put a flying counter on a creature they control.

As long as Skycoach is a creature, creatures you control have flying.

Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)