Grond, The Wolf's Head

This spell can't be countered.
Trample
Crew {8} (Tap any number of creatures you control
with total power 8 or more: This Vehicle becomes an artifact creature until end of turn.)
Whenever Grond, The Wolf's Head deals
damage to a player, sacrifice a creature.
Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents.)