It took a lot of grinding, but I finally got Nexus Horizon. It is a decent and fairly good camo, but I will say for the pain and suffering that you have to do grinding, it's really not worth it in my opinion.
Don't get me wrong getting the camos done for end game are very fast and easy and zombies it's not as easy it's more so long and tedious having to do a lot of save and quitting to kill all the special enemies and war zone I really thought was going to be a toxic pool filled with those spinny idiots, but surprisingly there wasn't that many of them. The thing that really made it such a painful grind was multiplayer because of the omnidirectional movement and the fact that they're trying to copy every other PvP game like Destiny 2. It was such a horrible experience throughout my entire playthrough of multiplayer to get the camo. I queued up against two cheaters and one group of sweaty little influencers that abused spawn manipulation. I definitely think that this is going to be my last COD because I can clearly tell that it is dying, especially when you play multiplayer, and you meet the same people that you played against over and over, over a span of weeks. Whenever someone would complain and calms I would always tell them to stop complaining, it's not like you'll ever meet us ever again, but I can't even say that anymore because I met a lot of them over the span of my grind getting the camos done. So it's a good camo, but Activision and the Call of Duty developers really need to fix some stuff if they want to keep player retention, because right now this is 100% my last COD unless they make a Zombies-only COD.
Oh, also, my advice on how to complete the camo grind, zombies, there's no real way, you just got to do it, except for special enemies, do save and quit on special rounds when they spawn to not have to do multiple matches. End Game there's tons of YouTube tutorials, War Zone play casuals since its filled with bot lobbies and multiplayer hope that there's limited time game modes that can help benefit camos like the April Fools event or the one that body shots do no damage while headshots do the most, and for the final parts of multiplayer triple and double kills you should do it in hardcore and five kills you should do in hardcore but with bigger maps to prevent yourself from dying so easily that's my advice for everyone.