The Batmobile

Indestructible, Trample
Whenever The Batmobile attacks, deploy 5. (Look at the top five cards of your library and put a Gadget card from among them with converted mana cost 5 or less onto the battlefield. Put the rest on the bottom of your library in a random order.)
Crew 4 (Tap any number of creatures you control with total power 4 or more: This Vehicle becomes an artifact creature until end of turn.)