If you have been stuck in Astra Malorum runs in Black Ops 7 for more than a few rounds, you have probably had that “oh no” moment when OSCAR stomps into view, and the vibe goes from casual farming to full panic, even if you were just messing around and talking about CoD BO7 Bot Lobby setups with your squad a second earlier because once he locks on, sneaking past does not feel like a real option anymore, even though the game technically lets you try to creep around his patrol route if you really want to play it safe. Why OSCAR Feels Unkillable The first thing that throws people off is how little damage he seems to take. You can sit there holding the trigger, dumping full mags into the big metal frame, and his health bar just shrugs it off. It is not like other elites where you swap to fire or shock and suddenly they melt. With OSCAR, the usual elemental ammo tricks do not do anything to his actual body. A lot of players wipe here because they assume they just need “more DPS” or a higher Pack-a-Punch tier, so they stand their ground, get surrounded, and burn through every self-revive they brought into the match. Focus On The Drones, Not The Chassis The fight changes once you stop staring at the robot and start watching the air above him. OSCAR keeps spawning those weird, flying saucer drones that float around his head, and they are the real problem. While those drones are up, he is basically wrapped in a full damage shield. You can hit him with LMGs, wonder weapons, whatever, and it does not matter. You have to clear the drones to crack that shield. Technically, you can shoot them with any gun, but when the room is full of sprinting zombies and explosives going off, trying to pick off tiny targets with standard bullets turns into a messy, slow, and usually fatal chore. Why Brain Rot Turns The Fight Around This is where the Brain Rot ammo mod quietly becomes top tier for this encounter. Players testing different builds worked out that those UFO drones are extremely fragile to Brain Rot, almost like they were tuned around it. Once you put Brain Rot on a reliable weapon, the drones stop feeling like a wall and more like clay pigeons; a few clean shots and they pop almost instantly, which takes the fight from a grind to something that feels manageable even in higher rounds. As soon as the last drone goes down, his shield drops, and for a short window, every bullet and every equipment piece finally hits the way you expected from the start. Keeping Control When The Room Goes Crazy The trick is to treat OSCAR like a rotation fight, not a stand-and-trade duel. Keep moving the whole time, drag the zombie train away from him when you can, then swing your aim up, delete the drones with your Brain Rot gun, and snap back to his body to pour in damage before he cycles the shield again and spawns more drones. If you stall, he resets, and the fight drags on until something goes wrong. Once you get that rhythm down, he stops feeling like an impossible wall and turns into a scripted mini-boss you farm for loot between serious attempts or while chatting about which CoD BO7 Bot Lobbies for sale are worth checking out.