I shot things in the head over and over and over and then after weeks of doing the same crap over and over I bought it off a guy in the tower. The end. Is not a cool story. I banked my sparrow off a wall, gunned the engine, jumped off as it plowed into the archon, stuck a grenade to his head. Emptied a clip into him as it exploded, jump punched him in the face, then let him have it with death from above, and got this exotic for my trouble. That is a cool story, destiny doesn't do those.