Myr Starliner

Myr Offering (You may cast this card any time you could cast an instant by sacrificing a Myr permanent. If you do, the total cost to cast this card is reduced by the sacrificed permanent's mana cost.)
Flying
Myr Crew 2 (Tap any number of Myr creatures
with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.)