Thopter Squadron comes into play with three +1/+1 counters on it.
, Remove a +1/+1 counter from Thopter Squadron: Put a Thopter token into play. Treat this token as a 1/1 artifact creature with flying. Play this ability as a sorcery.
, Sacrifice a Thopter: Put a +1/+1 counter on Thopter Squadron. Play this ability as a sorcery.