Part sword, part shield, the Centaur excels at charging headlong into enemy fire.
The Centaur is an Archwing based melee that also acts as a shield, which shares its own basic six-hit combo with Rathbone, but also possesses its own six-hit combo when used in quick melee (primary weapon equipped).
A Centaur is a mythological creature that is half-human, half-horse.
Incidentally, there is a species of Rhinoceros beetle called the Centaurus beetle. The Centaur's blade resembles a Rhinoceros beetle's characteristic horn while the body of the weapon resembles the beetle's head.
The Centaur (along with the Fluctus and the Itzal) was accidentally leaked in Update 15.6.1, where a bundle called the "Itzal Raider Pack" visually replaced the Stealth Pack in the Market. The Stealth Bundle still functioned as normal however.