Ah, see! I told you someone would know more.

The reef 4 -He let his captors drag him through the dirt. His arms ached. Two hands wrapped around each bicep like iron bands. He slumped, and the toes of his scuffed boots bumped over the stones and left trails in the dust. He kept his eyes low, a ragged and stained cloak hanging over his face. It was not a position to which he was accustomed. They debased him. They abused him. He bit the inside of his cheek until the blood filled his mouth. He struggled not to resist. They needed to believe he was broken. That he wasn’t a threat. It was the only way they would bring him before their kell. He’d spent weeks weaving the illusion that led the Fallen to him. He’d left bits of his trail where they couldn’t help but find them. He skulked from planet to planet—Mars, then Venus, then Mercury, then back again—following rumors and whispers. He’d hid from the Guardians, from his own people. He’d let everything they had built fall apart, while those still loyal to him searched every inch of this forsaken system. Now it was time to stop searching and start building. He would need soldiers who answered to him and no one else. Bodies to shape with will and magic and tech to his needs. These would serve. He thought they would take him to a ketch. But they were deep underground. Not near the Cosmodrome, but... it didn’t matter. He’d never been particularly concerned with the geography of this blasted world. It was not his home. So he bent his head low, and listened to the guttural string of hisses and clicks issuing from the maw of a would-be king in yellow. A broken ruler of a broken house, and the last of his kind. They were more alike than he cared to admit. When the creature’s anger had burnt itself out, he raised his head to look at it. He did not need to speak. One kell rises, and another bends its knee. And the prince felt the little hum of starlight ripple through him. The one that let him know she would be pleased with what he had done.

There are a few grimoire's from Destiny 1 that help. The Aftermath- “Do not fear, brother. This was the only choice I had.” The sound of her voice ripped him from sleep. He jumped up; his ship was still contained in its protective sphere. He tried to retract the shield, but it was locked to its initiation time. He couldn’t remember activating it. Then he remembered the battle. That blast. What that ship fired was ancient, not bound to anything the Origin Libraries even sought to describe. He tried to calm down. He thought of her, searching for her pull. He couldn’t find it, but he was not calm. She always told him she would always be there behind the calm. All he could hear were echoes of that sound. It began as soon as they hit the ring plane, ringing in the old glimmer of his long-buried self. Before she showed him who he was—in the before and the after. The Techeuns should’ve known what the Dreadnaught could do. Must’ve known. Did they not feel what he felt? Hear what he heard? And that damn Ketch, it wasn’t protected. They had to know that. All to deploy the Harbingers. They barely got a foothold before the weapon was fired. He thought of Petra and how overwhelmed she must be, forced to hold her post, and watch her people perish. He tried to calm himself again, forcing long breaths. He realized where he was: Mars. Athabasca. The Candor Isles. He hadn’t been here in so long, not since he found the Black Garden. The countdown to the shield’s deactivation pulsed. He tried again, to home in on her, to find if she truly gave herself for this battle. He felt close to something, a hum of starlight, then shield deactivation broke his focus. He climbed out and saw the damage to his ship, and the truths of the armada's devastation sunk in. He turned in despair to find hundreds of his Crow drones, deployed on Mars long ago, circling his ship, waiting. “Welcome back, Master.” The one closest to him spoke first, and the others followed, a wave of salutations echoed throughout the dry sea. And with that hope returned. “Begin repairs on the ship immediately. Something has gone missing and you will help me find it.”

:)