You drop into the chaos, and instead of the trusty Pack-a-Punch, there’s just this busted, sparking wreck. That’s Ol’ Tessie. She’s dead in the water until you fix her up, and without her, those late rounds are gonna chew you alive. Think of it like a scavenger hunt, but one with teeth. You’ll need three parts, and they’re spread all over the map. Oh, and if you’ve ever messed around with a CoD BO7 Bot Lobby, you’ll know the value of getting set up early—it’s the same deal here.

The Fusing Cell: This one’s easy to find but not so easy to grab. Head to the Research Lab. There’s a containment unit with a big red button—hard to miss. Hit it, and the lab locks down for about a minute. Zombies pour in, some in armour, so it’s not just a stroll. Hold them off until the timer runs out, then the unit opens and you can snag the Fusing Cell. It’s a straight-up holdout, so don’t even think about pressing that button unless you’ve got a weapon that can handle the heat.

The Aetherium Lens: Down in the Underground Caverns, you’ll see a massive drilling machine that’s powered off. Spend 1,500 points to fire it up. It’ll start chewing into an Aetherium crystal, and that noise will drag every zombie nearby straight to it. You don’t have to babysit it right on top, but you can’t let the horde smash it to bits either. When the drill finishes, the Lens drops out, and you’re good to go. Quick job if you keep the undead off its back.

The Focusing Array: This one’s tied to the new Screamer mini-boss. They start showing up around round eight or ten. These things hit you with sonic blasts that mess up your movement, but they’re not tanks. Keep your distance, aim for the head, and they’ll go down fast. The first Screamer you kill will always drop the Array, so you don’t have to grind for it—just be ready when they appear.

Once you’ve got all three parts, head back to Ol’ Tessie and slot them in. She’ll fire up, and you’re back in business. First upgrade’s the usual 5,000 points—more damage, bigger mag. Then you can re-pack for Tier II at 7,500, and Tier III at 10,000. After your first upgrade, you can drop 2,000 points to reroll your Alternate Ammo Type—getting Dead Wire or Brain Rot early can save your skin. Get those parts sorted quick, because high rounds don’t wait around. And if you’ve ever checked out u4gm CoD BO7 Bot Lobbies, you’ll know that having the right setup makes all the difference when things get messy.