Artemis

Artemis is the sword wielded by Turner Dyan. It has eaten the Inu Inu no Mi, becoming a Dog Sword (犬剣, Inuken).

Overview
Originally, the sword was an unnamed masterpiece, which later received a name after it was given the Inu Inu no Mi. Prior to its evolution, it resembled a normal katana, but afterwards, it transformed into an elongated version of itself; resembling a mix between a classic katana and a broadsword. Additionally, its guard is covered with a prominent mass of dog fur. It is noted that the weight of the sword is enough to crush the rock beneath it, even when placed onto the ground with gentle case.

Due to the fact that the Artemis has become a mixture between a dog and a sword, Dyan is able to invoke the powers of his Horu Horu no Mi to control the hormones within the blade itself. By doing so, he can manipulate its form in order to conceal its true nature, allowing the Artemis to return to its prior form of a standard katana. At any time, Dyan can transform the sword back into its true dog sword form. The way in which the dog blade appears to expand, becoming elongated and curved, due to hormone manipulation has prompted Stella to vulgarly call it a "Cockblade" (陰茎剣 (コックブレード), Kokkuburēdo; Japanese for "Penis Sword") in its "boner form", much to Dyan's protest of that name being "disgusting but not inaccurate".

Trivia

 * In Greek mythology, Artemis is the goddess of the hunt, the wilderness, and the Moon.