Jesus crist i did like 11 corrupted and i didn't get any horror least nether i was bad, alredy corrupted is one of the most annoying nightfall and has the worst drop rate ever exist. Bungie do my a favor e buff this shitty drop rate lika reckoning.
i think i might have the greatest nightfall rng ever, i did 3 solo Strange Terrain nightfalls in a row when that light handicap glitch was happening and got 3 masterworked braytech ospreys, ran the insight terminus once for the cool sniper and got it first try. it might have something to do with your light handicap being too low, maybe if you set it to ~100 itll guarantee a drop?