We were overwhelmed. I could not save mine, so I have hidden myself where I might be found by the others, if they even survive. There is most likely no possibility of my return to the City. I prepare here in summary the knowledge so painfully won by my Guardian and our fireteam.
The Moon has been geoengineered into an impregnable fortress, designed to support a vast number of - creatures - if any mind could be evil enough to create them. Are they alive? They move, they shriek, they fall upon us in ravenous waves. But I see death, decay, and corruption, not life. We discovered, to our sorrow, one massive set of gates. There are likely more.
We met a towering monster, wielding a sword of utter darkness. The Light only made it hungry. We tried to fight, and we fell. Too many times to remember.
We were all brave, I assure you. May the Light find Guardians capable of facing this monstrosity, or I fear the Moon may be lost to us forever.