Grand Crusher

"“Under the wisdom of humanity on Earth and the civilizations of the universe and the oath of justice to the Lord God, become the light that surpasses even the Event Horizon! The Causality Deusword Grand Crusher! Activation! Approved!! THESE ARE THE KEYS TO VICTORY!!” —Activation call" The Causality Deusword Grand Crusher (因果神剣グラン・クラッシャー) is the final superweapon that is developed by the Universal Alliance as their last resort to stop the greatest threats they could ever face. It was activated and used for the first and only time by Grandeus to end the menace of the Final Gods once and for all.

Appearance
The Grand Crusher's "base handle" is a large portal-like device that is the size of three Earths. Connecting the bridges at the very bottom of the base is the Tevat Noah with the original Grand Chariot sword attached to its bottom rear.

When activated, it emits a massive shockwave energy in the shape of a blade, radiating with every color imaginable.

History
Since the Babel War that had taken a toll on the Justice Alliance and the nations of the Earth, the newly founded Earth Defense Force had been proposing for a superweapon designed to protect humanity and counter enemies and threats on at least the level of 666. While several plans of such a weapon were proposed, none of them came to light until the near end of World War III and the start of the merging of the three Earths that had occupied the same temporal-spatial vicinity for some time now. At that point, much of Earth of the main universe was destroyed by the war and the subsequent invasion of the Underworld Legion. After the remnants of humanity under the Provisional Government of the Kingdom of the Earth led by Ichirou Tachibana and the Justice Alliance departed Earth through the continent-sized flagship Tevat Noah to then fight in the wars in outer space, plans of a planet-sized superpower were put into motion.

The proposed superweapon was the last in a series of four megaprojects as part of the Civilization Salvation Plan, its official operative name being Holy Kingdom of the Earth Civilization Salvation Plan Final Phase: Sword of God (Former Third Planet of the Solar System) - Multiverse Absolute Defense Universal Alliance Special Attack Final Mass Super Weapon. (神聖地球王国文明救世計画最終形態：神剣（太陽系旧三番惑星）・多元宇宙絶対防衛用宇宙連盟特別攻撃最終質量超兵器) While Earth's forces and their allied alien forces are fighting against enemy interstellar empires, they were developing the superweapon back at home, salvaging components of various star portals that were used in the conquest of various worlds across the galaxy.

The weapon was however still under construction and development during the fight against Quasarmageddon Chaos and much of the duration of the final battle against Azathoth-Omega that takes place four billion years into the future. Fortunately, the Universal Alliance barely managed to complete the new superweapon as much of their forces was being wiped out by the infinite army of Final Gods. What remained of the defending armies of the universe retreated back to the vicinity inside the weapon so massively large that it can easily occupy the space of three Earths, but not before discovering Azathoth's and the Final Gods' weakness in reaction to a certain vibrational frequency. The superweapon was set to tune that specific vibrational frequency of space-time to control causality, as a means to hopefully cancel out the antimatter composition of Azathoth-Omega and the Final Gods and vanquish them out of existence, as well as restore the three Earths back to their singular ordered state.

With all forces fighting the Final Gods retreated, the Alliance turned on the superweapon's electromagnetic field to attract and unify the three Earth's magnetic poles and gravitational field to give the weapon power. Grandeus served the trigger to fully activate the weapon and "wielded" it, christening as the Causality Deusword Grand Crusher, the most powerful weapon in the universe. With a single stroke down of its "blade", it was able to erase trillions of Final Gods with ease. However, the demonstration of such a great newfound power was but a mere respite, since Azathoth's power is infinite and can summon even more enemies than before. However, thanks to Metatrovorius' space-time manipulation, Alphadios' spiritual powers and Grand Crusher's vibrational frequency, Azathoth-Omega was then pierced by the Grand Crusher and ultimately destroyed, reducing into a black hole as a last act to plunge all of reality into nothingness. As a final move to save all of the existence, Grandeus and its Grand Crusher, now imbued with the power of all the allies and the countless spirits that helped in the final battle, charged straight into the black hole at a speed so fast that it broke through the light barrier. Afterwards, the black hole vanished and the universe was saved.

Quotes

 * Shougo: “As expected, the vibrational frequency from that Final God has stopped! The time has come for us, the ones with justice, to fulfill our greatest mission! All members! Activate Formation G!” All: “Roger!!” Shougo: “Morino, Kiryuu, let us use the keys entrusted to us by the God-ordained powers from all nations and galaxies!” Yuuko: “Yes!” Takuma: “Understood!” Takuma: “Under the wisdom of humanity on Earth and the civilizations of the universe!” Yuuko: “And the oath of justice to the Lord God!” Shougo: “Become the light that surpasses even the Event Horizon!” Shougo, Yuuko and Takuma: “The Causality Deusword Grand Crusher! Activation!” Shougo: “Approved!! THESE ARE THE KEYS TO VICTORY!!” (昭吾：「予測通りあの極神からの振動数が途絶えました！ 我ら正義ある者最大の使命を果たす時が来た！ 総員！フォーメーションG発揮！」 全員：「了解！！」 昭吾：「森乃君、桐生君、銀河の万国に神の任命ある盟主から託されたキーを！」 由子：「ええ！」 宅麻：「わかった！」 宅麻：「地球の人類と宇宙の文明の叡智と！」 由子：「主なる神へ正義の誓いの元に！」 昭吾：「因果地平を超える全能なる光となれ！」 昭吾、由子＆宅麻：「因果神剣グラン・クラッシャー、発動！」 昭吾：「承認！！これが勝利の鍵だぁぁぁーっ！！」)
 * “Crusher Connect!! Causality Deusword GRAN CRUSHEEEEER!!” (クラッシャーコネクト！！因果神剣グラン・クラッシャァァァッ！！)