The Umgah Drone is the lowest ranked ship in the entire Hierarchy lineup, even though it can zip backwards very quickly with its retro-propulsion system (its special ability), plus its Anti-Matter Cone weapon (which sucks enemy crew members from a ship when it comes into contact of its spray) can be hard to get a shot past due to its cone shape when it is activated (which the weapon also doesn't drain any fuel whatsoever when it is being used either). It is also the cheapest ship to build in a full game and has a high amount of fuel and refueling speed.