So, I've gone through the process of completing Excision on Grandmaster, and my Ergo Sum catalyst is nowhere to be found. My Grandmaster completion is marked in my triumphs, and yet the catalyst eludes me. I don't want to sit through another dozen fireteam lobbies trying to get a team together, wherein people disconnect due to the mission's lag issues, or after the team wipes a single time. Help. Please. I just want my catalyst. Is this a case where I'm just SOL or what?