An Extirpeur Knife has a red handle and a strangely shaped blade. The blade is split into three separate blades, two on either side, and the main blade. Each of these blades has a curve on the same side. The two side blades are pale gold-colored while the center blade is red. The shaft of the blade is black and has a circular hole in its center.
"Extirpeur" is a slight misspelling of "extirper", meaning "eradicate", or "extirpateur", meaning "eradicator". This is a reference to Larxene's ferocity in battle.
Contrary to its description, Extripeur's combo seems to be most significant with its ground combo, containing four moves in total. It begins with a low, circular sweep, knives brandished, and is immediately followed by an identical move. Afterward comes a jumping vertical spin, which finishes with a lunge forward, knives extended, ending with a spinning slash and cartwheel.
Its aerial combo consists of only two to three moves. It begins with two left and right swipes and is finished by a mid-air roll, ending with a downward slash with the knives. Continuing to press will result in a repeat of the latter move: a mid-air roll and downward slash.