A Croix du Sud Knife's handle is a black ring, attached to the blade by a small, orange cross. The blade is a ring like the handle, albeit larger and sporting a black inner edge and a yellow-orange outer one. It has three spikes, one on each side and a third, longer one on the top of the blade. There is a yellow diamond placed in the middle of the blade. This model of Knife is identical in shape to the an Etoile Knife, only differing in coloration.
The ground combo begins with a spin close to the ground followed by Larxene performing a backwards 360 in the air, and then, jumping into the air, performs an aerial backflip while throwing her Knives to the ground. The aerial combo consists of an upward diagonal slash, followed by a downward swipe with both hands, and ends with Larxene striking the enemy as she somersaults in mid-air and does a powerful downward slash.
| Annihilation | Energy Muzzle | Foxfire | Subzero | Hyperion | Lost Heterodoxy | King of the Night | Outbreak | Million Bucks | The Devil | Vindictive Thistle | Croix du Sud | Astral Blast|
Soul Eater+ | Mage's Staff+ | Knight's Shield+ | Kingdom Key D+ | Kingdom Key+