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The «Conflagrant Flame Bow» is a Divine Instrument-class longbow used by Integrity Knight Deusolbert Synthesis Seven. The longbow is strong enough to launch even 30 arrows or more simultaneously, but the string of the bow might break after such an attack. Like all Divine Instrument class weapons, the longbow can be strengthened by using the «armament full control art» on it. Once such an art is applied, the bow is set on fire and the heat of the bow can be clearly felt in the surrounding area. In this state, if the user places his hand to where the bow’s string should be, even if the string is broken, the flames of the bow will surge out in front of the bow, forming an arrow of flame. By the time the "string" is drawn to its end, the arrow grows to the size of a spear and creates a howl similar to that of a dragon's fire breath when launched. If the launched arrow loses its power after hitting several targets consecutively, it can change its form into that of a bird, creating a large heat wave and gaining more power.
The longbow can also be used in close-range battles as well, by gathering the longbow's flames in one's fist and using the fist to attack the opponent.
The copper-red bow is of nearly the same size as its user, Deusolbert Synthesis Seven.
As the flame arrow launched from the bow can change its form into a bird of prey, it is likely that the longbow was created by turning a powerful bird-like creature, likely a phoenix, into a weapon.