Steam Powered Rhino Warrior

Crew 3(Tap any number of untapped creatures you control with total power 3 or greater: This permanent becomes an artifact creature until end of turn.)
Whenever Steam Powered Rhino Warrior gets crewed, Rig(Create a token that's a copy of target artifact or creature you control, except it's an artifact in addition to its other types. That token gains haste. Exile it at the beginning of the next end step.)