Operation King Killer Guide – BO7 Endgame Season 4 Reloaded

Act IV is the final operation in Black Ops 7 Endgame. The Guild's Central Command Node got exposed in Act III: your reward for that work is ten more objectives before the whole thing collapses. All missions start in Zone III or higher. The final step drops you into a Nightmare difficulty boss fight that will absolutely kill your squad if you're not prepared.

The BO7 Endgame Season 4 Reloaded update launched June 25, 2026. Operation King Killer is the last operation this mode gets. After Season 5 wraps, the free-to-play window closes. Act accordingly.

Do NOT prestige your operator before completing Act IV. Prestige resets your Combat Rating, Field Acquisitions, and loadout rarity. If you wipe your build before the Nightmare boss fight, that's on you.

All 10 Steps

Vehicular Violence: Zone III

• Destroy a VTOL with a Melee Weapon
• Kill 20 Guild Tech or Hunan enemies with a Vehicle Turret
• Destroy an occupied Guild Vehicle with a Scorestreak or Equipment

The Reboot counts as equipment for the vehicle kill: it's technically a grenade. Don't overthink it. The melee VTOL takes a group effort. Get everyone hitting at once or you'll watch it explode before you blink.

Reward: 'Decompression' Weapon Charm + 1,000 XP

Gear Head: Zone III

• Kill 10 Fears rapidly with a Molotov
• Kill 3 enemies rapidly with a remote piloted Needle Drone
• Eliminate 20 enemies using Equipment

Farm Guild Checkpoints for Needle Drones. Molotovs drop from Guild Score Streak crates. Equipment kill tracking is inconsistent: Reboot sometimes counts, sometimes doesn't. Enjoy the randomness.

Reward: Restore Token + 1,000 XP

Power Tools: Zone III

• Kill 40 enemies with the Rhino Scorestreak
• Eliminate 5 enemies through objects with the Gravemaker Scorestreak
• Kill 5 enemies rapidly with the RC-XD Scorestreak

Score streak availability is RNG. This step will delay your run more than any other. The Gravemaker wall-penetration kills work through trees. Get comfortable camping behind one and waiting for groups.

Reward: 1 Hour Double XP Token + 1,000 XP

Danger CloseZone III

• Kill an enemy with the Combat Axe from more than 50 meters away
• Kill 5 Special Enemies with an Exotic Melee Weapon
• Kill 10 enemies rapidly with a Melee Weapon

The 50-meter Combat Axe kill is exactly as annoying as it sounds. High ground, enemy standing still, don't miss.

Reward: 'Last Breath' Emblem + 2,500 XP

High Octane: Zone IV

• Kill an Infester with Equipment
• Kill 10 VTOL passengers before they deploy
• Kill 5 enemies while airborne

Welcome to Zone IV. VTOL passenger kills require you to intercept VTOLs early: don't let them land. The airborne kills are trivial. Jump off anything elevated and shoot. Done.

Reward: 1 Hour Double Battle Pass XP Token + 2,500 XP

Hands Tied: Zone IV

• Kill 20 enemies with an Ability
• Get 20 kills from summoned D.A.W.G.s, Guild Bots, or Fears
• Activate an Exfil and escape without firing a weapon

The Exfil challenge is the highlight: escape a Zone IV Exfil without shooting anything. Coordinate with your squad to cover you. Or accept your fate multiple times until it works out.

Reward: 'Upper Limit' Large Decal + 2,500 XP

Peak Performance: Zone IV

• Destroy a VTOL before it deploys all its passengers
• Complete a Grid Takedown Activity within 60 seconds
• Complete a Guild Checkpoint Activity before reinforcements arrive

The Grid Takedown 60-second window is tight but fair. Hit it with a solid squad. The checkpoint race is worse when other players have already cleared most of the zone's enemies: welcome to shared lobbies.

Reward: 1 Hour Double Weapon XP Token + 5,000 XP

Blood Rider: Nightmare Zone

• Kill 50 Fears with the Blood Burner Ability
• Kill 10 enemies with the Blood Burner Ability during a Guild Strike Activity

You're in Nightmare territory now. Blood Burner is your life here. Fear density is high enough to farm kills reasonably fast. Guild Strike adds time pressure: get your 10 before the wave ends.

Reward: Loading Screen + 5,000 XP

Final Approach: Nightmare Zone

• Collect Command Data from 3 different Avalon data sources
• Survive a Nightmare Zone for 5 minutes without being downed
• Complete the Command Node breach objective

Survival challenge in a Nightmare Zone with a full Combat Rating 60 target on your back. Every enemy prioritizes you. Use cover aggressively. Guardian skill track's Rescue Pulse passive keeps downed teammates in the fight.

Reward: Coolant Leak Weapon Blueprint + 5,000 XP

Prime Target: Nightmare Zone

• Access the Prime Target Glitch
• Defeat the Glitch Boss: three waves, Nightmare difficulty

Final step. The arena is recycled from the BO7 campaign containment mission, which is either nostalgic or lazy depending on how charitable you're feeling. Three boss waves instead of the usual six: because each one is harder.

Reward: Operation Complete: 7,500 XP + cosmetics below

Prime Target Glitch Boss: How It Works

The Black Ops 7 Endgame final boss fight runs three phases. No health bar progress between them. The arena locks you in, so bring ammo. Reboot is your best tool here: it hits for 12k per shot and bypasses some immunity mechanics.

Phase 1: Shard Collection

Boss enters immunity. Walk through shards to collect them: you don't need to interact, just step on them. The boss guards the center. Don't fight him there. Collect, then damage when he's vulnerable.

Phase 2: Meatballs

Projectile AOE attack added. They can be shot. They will also absolutely hit you if you're standing still. Keep moving. Secure zones break immunity this phase: step on the pressure pads and coordinate timing with your squad.

Phase 3: The Demon

Ground slam kills on contact. When the boss jumps to center, get off the ground: grapple hook or high platform. The laser tracks. The stomp insta-downs. Use crash carts strategically, not desperately. Shoot the core when the opening appears.

Deck weapons are not optional in Phase 3. If your loadout isn't at high rarity, you will feel it. The boss has enough HP that underpowered builds waste everyone's time. Sort your gear before .

Rewards Summary

The Coolant Leak blueprint has a transparent magazine and subtle animation. It looks different in the menu than in-game. Adjust your expectations appropriately.

Guardian Skill Track

Season 4 Reloaded added the Guardian skill track alongside this operation. For the Nightmare difficulty content in steps 8–10, it changes the math considerably. Six skills, all built around absorbing punishment instead of avoiding it.

• Payback: Reflects a portion of received damage back at attackers
• Battle Cache: Kill enemies, spawn ammo and armor resupply packs
• Power Tap: Resupply pickups also recharge Equipment
• Fortified: Damage reduction scales with equipped armor plates
• Iron Grip: Reduced hipfire spread; you don't flinch when hit
• Rescue Pulse: Revive downed allies by proximity; they return the favor

Rescue Pulse alone justifies equipping this track for the Glitch Boss fight. Running it alongside Phoenix Burst and Sleeper Agent builds a viable squad anchor. The Endgame Guardian build for the boss fight is the current meta recommendation.

General Tips

• Progress tracks individually: squadmates can't complete challenges for you. This is intentional design. Whether it's good design is a separate conversation.
• Score streak availability is RNG. Step 3 will take longer than it should. Accept this.
• Farm Guild Checkpoints for equipment drops when you need specific gear.
• Reboot counts as grenade for equipment kills: sometimes. Test it in your current session.
• Reach Combat Rating 60 before attempting the Nightmare boss. You become a priority target regardless. At least be tanky.
• Three Prestige cycles get you to CR 88. Skill tracks are randomized on each reset. RNG all the way down.

Endgame is free-to-play until end of Season 5: estimated September 3, 2026. After that, you either own the full game or you leave. No Operation King Killer carries over into any grace period.