I acquired the Dyadic Prism from Ghost, but I don't know what to do with it? Every guide is telling me to go to the Sacrarium, but I'm not seeing a waypoint for it. I'm not sure if it's supposed to be that way, but the Dyadic Prism doesn't have any text next to the little box at the bottom of the description. My guess is that I broke something by getting Ergo Sum via Grandmaster Excission before finishing this quest line first. Any way to fix this? Thanks.