Chopper, Astromech Droid

All Rebels you currently control gain +1/+1.
Artifacts cost {1} less to cast for each Rebel
in play.
If you would be dealt damage from a source
you may negate the damage and put a
counter on this card instead.
When 'Chopper, Astromech Droid' has
three or more counters, sacrifice it.
Flashback {5}