The Perilous Venture

The Perilous Venture's converted mana cost, power, toughness, and crew cost are each equal to the number of vehicles you control.
Flying, assault (When this deals lethal damage to a creature, you may have it deal damage equal to its power to that creature's controller)
Crew X (Tap any number of untapped creatures you control with total power X or greater: This permanent becomes an artifact creature until end of turn.)