Chewbacca, the Wookie

Partner with Han Solo
Whenever Chewbacca, the Wookie attacks,
another target creature you control gain
indestructible until end of turn.
Whenever a creature an opponent controls dies,
Chewbacca, the Wookie gain an experience
counter. Once he has reach 7 counters,
you may transform Chewbacca, the Wookie.