almost every space faring society has a legend or a myth regarding a god like , omni potent being with a weapon able to destroy everything and everyone. Able to split worlds asunder and slay the mightiest of oponents.
While the weapon is often described differently and according to the culture,it almost always is a melee weapon; a bladed weapon or in other words a sword of some kind.
This weapon is usually wielded by a trusted servant of the God being.
While the general population and science of the Union rejects beings with supernatural powers and artifacts with supernatural powers and properties, there are societies and groups seeking the Sword of God.
Some say Dark Blade the sword of the Dark One is that sword. Others believe it is a weapon designed to slay this an every entit.
Genesis 3:24 King James Version (KJV)
24 So he drove out the man; and he placed at the east of the garden of Eden Cherubims, and a flaming sword which turned every way, to keep the way of the tree of life.
Ezekiel 21 New King James Version (NKJV)
Babylon, the Sword of God
21 And the word of the Lord came to me, saying, 2 “Son of man, set your face toward Jerusalem, preach[a] against the holy places, and prophesy against the land of Israel; 3 and say to the land of Israel, ‘Thus says the Lord: “Behold, I am against you, and I will draw My sword out of its sheath and cut off both righteous and wicked from you. 4 Because I will cut off both righteous and wicked from you, therefore My sword shall go out of its sheath against all flesh from south to north, 5 that all flesh may know that I, the Lord, have drawn My sword out of its sheath; it shall not return anymore.”