Divine Object

A «Divine Instrument» (神器), also known as a Sacred Tool or a Sacred Instrument, is an item in Underworld that was created by converting an animal, plant or object which had gathered a large amount of resources (memories) into a high «Priority» item via a high-ranking Sacred Arts ritual. The «Priority» Class of Divine Instruments outrank even items made out of Dragon bones (supposedly the highest grade material for weapons in Underworld). Weapons of this class can be enchanted with the high-ranking «armament full control» Sacred Art ritual that unlocks the true potential of the weapon.

Most Divine Instruments are created by the Axiom Church and are used as weapons by the Integrity Knights. However, non-weapon Divine Instruments also exist and usually have a certain "magical" attribute that allows them to do tasks which would normally require high-ranking Sacred Art rituals, like telling the current time in Underworld.

Background
As creating objects of a certain priority requires sacrificing an existence equal to the desired item, all Divine Instruments are created from objects, animals or plants that have existed for long periods of time and have thus absorbed a large amount of resources and, because of that, have a large level of Priority. The created weapons inherit the parameters (i.e. memories) of the base material that they are made from, allowing the use of «armament full control arts» on such weapons to awaken the weapons true parameters of the weapon, greatly boosting the offensive power of the weapon.

Known Divine Instruments

 * «Divine Instrument of Engraved Time» - in other words, a clock, was a Divine Instrument used for telling the exact time in Underworld, but they were supposedly destroyed by gods, as people used to look at it too often and never got to work seriously.
 * «Bells of Time Telling» - one of the most widespread Divine Instruments in Underworld, which replaced the «Divine Instrument of Engraved Time». Unlike the previously used Instrument, The Bells only chimes once every half hour, with a different melody each hour in a 12 hour period. Every settlement has at least one Bell, while large settlements like Centoria have plenty of these Bells all over the place. The Bells were actually created by the Axiom Church as a method to keep town and village residents from moving too far away from their hometown, as the bells can only be heard within a fixed radius of the settlement, creating a psychological thought for most people to stay within the radius.
 * «Blue Rose Sword» - a Priority Class 45 sword found in a cave at the Mountain Range at the Edge in the north and is later acquired by Eugeo. The sword was created from a block of eternal ice.
 * «Frost Scale Whip» - an unknown Priority whip used by the Integrity Knight Eldrie Woolsburg. The whip was created from a two-headed snake which was the lord of the largest lake in the eastern empire and it has the ability to split into up to 7 parts with the «armament full control» art and even turn into an actual snake if the secondphase of the ritual is activated.
 * Wooden Sword - A Priority Class 46 sword crafted from a branch of the Gigas Cedar tree that received the most energy from Solus (the Sun) and Terraria (the earth).
 * «Conflagrant Flame Bow» - an unknown Priority longbow used by the Integrity Knight Deusolbert Synthesis Seven. It has the ability to shoot powerful flaming arrows, capable of taking the form of a bird, when the «armament full control art» is cast on it. The longbow was probably created from a phoenix.
 * «Heaven Piercing Sword» - an unknown Priority sword used by the Integrity Knight Fanatio Synthesis Two. The sword was forged from a thousand mirrors and is capable of firing light rays when the armament full control art is cast on the sword. With the second phase of the ritual, the sword begins firing short bursts of the ultra-hot light rays in all directions every second, hitting both the opponent, the sword's wielder, and any bystanders within range.
 * «Fragrant Olive Sword» - an extremely high Priority sword used by Integrity Knight Alice Synthesis Thirty. The sword was created from an immortal fragrant olive tree and is capable of turning into hundreds of extremely sharp and powerful petals, even one of which can easily split a rock into two, with the armament full control art in effect.