The Scorpion Tank

Whenever a Human creature you control
crews this Vehicle, this Vehicle gains +2/+0.
{5}{t}: Destroy any number of nonland
permanents target player controls, with
total converted mana cost equal to the
power of this creature.
Crew 10 (Tap any number of creatures you
control with total power 10 or more: This
Vehicle becomes an artifact creature until
end of turn.)