Action [1, Exhaust]: Attack with a space unit. It gets +1/+0 and gains Saboteur for this attack. (Ignore Sentinel and defeat the defender's Shields.)
Deployed Leader Unit:
Saboteur (When this unit attacks, ignore Sentinel and defeat the defender's Shields.)
Piloting Attached unit is a leader unit. It gains Saboteur. If it's a Transport, it also gets +1/+0.