Diamond Weapon (Final Fantasy XV)

Diamond Weapon is a colossal magitek monster created by Verstael Besithia in the Final Fantasy XV Universe. It appears in Kingsglaive: Final Fantasy XV movie, and is mentioned in Final Fantasy XV: Episode Prompto. It is based on the Diamond Weapon boss from Final Fantasy VII. It is not named in the movie, but is referred to by the codename "Diamond Weapon" in "Episode Prompto".

Profile
In his correspondence with the emperor, Verstael refers to the Diamond Weapon as a "daemon armor". It is a monstrous creature that towers over buildings. It has a glowing red sphere in its chest, and a another such orb on its forehead. It has shoulder appendages that open up and shoot salvos of energy beams, demolishing everything in its path. It moves bipedal and has an appendage on its back that resembles a cape.

Story
On 8th of April M.E. 756 Verstael informed Emperor Aldercapt that the Diamond Weapon was ready and asked him to come view the new weapon at First Production Facility.

Diamond Weapon is a daemon deployed to terrorize Lucis at the behest of Niflheim. When the Kingsglaive engage the empire in Duscae region, the sun sets and the empire deploys a Diamond Weapon upon them, but retreats after demonstrating its superiority to the Lucian forces. During the invasion of Insomnia, Niflheim deploys multiple Diamond Weapons against the Old Wall statues.

When the sun rises on the devastated Insomnia, the Diamond Weapons are gone. Whether Diamond Weapon can only be deployed at night is ambiguous, as even though the magitek armor for the imperial daemons is said to be lightproof, Diamond Weapon is only seen deployed at night in the movie.

Trivia

 * The artworks of Diamond Weapon seen on the documents in "Episode Prompto" are the concept art made for Kingsglaive: Final Fantasy XV.