Operation King Killer is the final Endgame operation of Call of Duty: Black Ops 7 Season 4 Reloaded (live since June 25, 2026), and it is the only way to get this season's flashiest reward: the "End of Dayz" animated mastery camo. Like every Endgame operation, it's a chain of escalating challenges that ends in a brutal Nightmare-difficulty Glitch Boss — and most players stall not on the boss, but on the grindy mid-steps and the fact that the best camo requires beating the boss three separate times with three specific Operators. This guide lays out all 10 steps, every challenge and reward, exactly how to reach and beat the Prime Target Glitch Boss, and the cleanest route to unlocking End of Dayz before the season rotates.
Quick answer: Operation King Killer is the Act IV (final) Endgame operation in Black Ops 7 Season 4 Reloaded. You complete 10 sequential steps starting in Zone III, escalating through Zone IV and into Nightmare Zones, finishing with the Prime Target Glitch — a Nightmare boss fight. Beat the Glitch Boss as Samuels, Wei Lin, or Emma Kagan to earn that Operator's "Data Freeze" skin; earning one skin unlocks the "End of Daze" camo, and earning all three unlocks the "End of Dayz" animated mastery camo. The full operation also drops a "Coolant Leak" weapon blueprint, the "To the Grave" animated calling card, and roughly 33,000 XP across its reward steps.
What is Operation King Killer in Black Ops 7 Endgame?
Endgame is Black Ops 7's open-world, extraction-style mode, and each season it runs a string of narrative Operations that gate the season's best cosmetics behind multi-step challenge chains. Operation King Killer is the fourth and final operation of Season 4, arriving with the Season 4 Reloaded mid-season drop on June 25, 2026.
The story hook: the Guild's Central Command Node has finally been exposed. As Call of Duty's Season 04 Reloaded announcement frames it, Operators "scour Avalon for anomalous data and other intel sources to help track down the location of the physical terminal housing the Command Node" — which is why the operation opens with vehicular combat and ends deep inside a corrupted Prime Target Glitch.
Mechanically, it's 10 steps. The first seven are standard combat challenges spread across Zone III and Zone IV; the last three push you into Nightmare Zones, the highest-threat areas in Endgame, before the final Glitch Boss. Every step you clear pays out cosmetics and XP, so even a partial run is worth doing — but the marquee rewards live at the very end.
How do you start Operation King Killer?
Operation King Killer kicks off with missions in Zone III or higher. You don't need a special item to begin — once you've loaded into Endgame with Season 4 Reloaded installed, the operation's first step (Vehicular Violence) is available as soon as you reach a Zone III area. Work the steps in order; each one unlocks the next.
A few practical notes before you grind:
- Zone tiering matters. Steps 1–4 are Zone III, Step 5–7 move to Zone IV, and Steps 8–10 are Nightmare Zones. The deeper the zone, the tougher the enemies and the better the loot — but also the higher the risk of losing your run.
- Bring the right tools. Several challenges demand specific Scorestreaks (Rhino, Gravemaker, RC-XD), Abilities (Blood Burner, Hand Cannon), and Equipment (Molotov, Combat Axe). Load these out before you drop so you're not stuck unable to progress a step.
- Squad up for the back half. The Nightmare Zones and the boss are designed around a coordinated team. Soloing is possible but punishing.
All 10 Operation King Killer steps and rewards
Here is the complete Operation King Killer challenge chain for Season 4 Reloaded, in order, with every requirement and reward:
| Step | Zone | Challenges | Reward |
|---|---|---|---|
| 1 — Vehicular Violence | Zone III | Destroy a VTOL with a Melee Weapon · 20 Guild Tech/Hunan kills with a Vehicle Turret · Destroy an occupied Guild Vehicle with a Scorestreak or Equipment | "Decompression" Weapon Charm + 1,000 XP |
| 2 — Gear Head | Zone III | 10 rapid Fears kills with a Molotov · 3 rapid kills with a remote Needle Drone · 20 kills with Equipment | Restore Token + 1,000 XP |
| 3 — Power Tools | Zone III | 40 kills with the Rhino Scorestreak · 5 through-object kills with the Gravemaker · 5 rapid kills with the RC-XD | 1-Hour Double XP Token + 1,000 XP |
| 4 — Danger Close | Zone III | Combat Axe kill from 50m+ · 5 Special Enemy kills with an Exotic Melee · 10 rapid Melee kills | "Last Breath" Emblem + 2,500 XP |
| 5 — High Octane | Zone IV | Kill an Infester with Equipment · Kill 10 VTOL passengers before they deploy · 5 airborne kills | 1-Hour Double Battle Pass XP Token + 2,500 XP |
| 6 — Hands Tied | Zone IV | 20 kills with an Ability · 20 kills from summoned D.A.W.G.s/Guild Bots/Fears · Exfil and escape without firing a weapon | "Upper Limit" Large Decal + 2,500 XP |
| 7 — Peak Performance | Zone IV | Destroy a VTOL before it deploys all passengers · Grid Takedown within 60 seconds · Guild Checkpoint before reinforcements arrive | 1-Hour Double Weapon XP Token + 5,000 XP |
| 8 — Blood Rider | Nightmare | 50 Fears kills with the Blood Burner Ability · 10 Blood Burner kills during a Guild Strike | "Dutybound" Loading Screen + 5,000 XP |
| 9 — Cannon Fodder | Nightmare | 2 kills with one Hand Cannon shot · 5 long-range Hand Cannon kills · 3 Elite kills with the Hand Cannon | "Hot Hands" Emote + 5,000 XP |
| Glitch Step — Prime Target | Nightmare | Complete a Terminal Vector Activity · Enter the Prime Target Glitch and defeat the Glitch Boss | "Coolant Leak" Weapon Blueprint + "To the Grave" Animated Calling Card + 7,500 XP |
That's 33,000 XP across the reward steps before you even count the Double XP tokens — which is exactly why the operation doubles as one of the fastest leveling routes in Black Ops 7 this season. Stacking those Double XP, Double Weapon XP, and Double Battle Pass XP tokens while you grind toward prestige is the smart move (see our Endgame operator prestige guide for how the combat-rating ladder works).
How do you beat the Prime Target Glitch Boss?
The final step, Prime Target, is the hard wall. To reach it you first complete a Terminal Vector Activity in a Nightmare Zone, which opens the Prime Target Glitch — a sealed arena where you survive escalating enemy waves and then face the Glitch Boss. It's the highest-difficulty fight in the operation, and it's tuned around a full, well-equipped squad.
Tips that actually move the needle:
- Clear Steps 8 and 9 first using the Blood Burner and Hand Cannon Abilities. You'll already be comfortable with the kit the Nightmare Zone rewards, and you avoid re-running the zone for missed challenges.
- Prioritize Elite and Special enemies during the waves — they spike the threat fastest and can collapse a run if ignored.
- Save your strongest Scorestreaks for the boss phase, not the trash waves. The boss has a large health pool and the arena keeps spawning adds.
- Coordinate revives. A wipe in the glitch sends you back; a squad that staggers downs and covers revives clears far more consistently than four players freelancing.
Defeating the Glitch Boss completes the operation and drops the "Coolant Leak" weapon blueprint, the "To the Grave" animated calling card, and 7,500 XP — but the real prize is what the boss kill unlocks depending on who you played.
How do you unlock the End of Dayz animated camo?
This is the part that trips people up. The Data Freeze Operator skins and the End of Dayz camo are not one-and-done — they're tied to which Operator lands the killing blow on the Glitch Boss.
- Beat the Prime Target Glitch Boss as Samuels, Wei Lin, or Emma Kagan → you earn that specific Operator's "Data Freeze" Operator Skin.
- Earn 1 "Data Freeze" skin → unlocks the "End of Daze" Weapon Camo.
- Earn all 3 "Data Freeze" skins (i.e. beat the boss once with each of the three Operators) → unlocks the "End of Dayz" Animated Weapon Camo — the season's headline cosmetic.
So the full grind for End of Dayz means three separate Glitch Boss clears, one each as Samuels, Wei Lin, and Emma Kagan. That's a meaningful time sink on top of the 10-step chain, and it's why this animated camo is genuinely rare — most players stop after one clear and the "End of Daze" camo. If you're chasing mastery camos this season, the BO7 mastery camo unlock service exists precisely for grinds like this. (For the broader camo picture, our Illicit Cargo event guide covers the other Season 4 animated camos.)
Is Operation King Killer worth doing?
For most players, yes — but be honest about your goal:
- If you want the XP and a couple of clean cosmetics, run the first 9 steps. The reward steps plus the Double XP tokens make it one of the better leveling chains of the season, and you'll bank an Emblem, a Loading Screen, an Emote, and a Decal along the way.
- If you want End of Dayz, commit to three boss clears with the three named Operators. It's the rarest flex in Season 4 Reloaded.
- If you're short on time, prioritize the Glitch Step for the "Coolant Leak" blueprint and the "To the Grave" calling card, then decide whether the triple-clear camo grind is worth it before the season ends.
Because this is the final operation of Season 4, it will rotate out when the next season launches — so the window to lock in End of Dayz is finite. Start now while Nightmare Zones are full of other squads also learning the fight.
Skip the Endgame grind — keep the rewards
Operation King Killer is designed so the challenges are the reward and the Nightmare triple-clear is the wall. If you want the End of Dayz camo, the Data Freeze skins, or the Endgame XP without burning a week on Nightmare Zones, that's exactly the gap to close:
Get the rewards on your own account, without the grind.
- CoD Account & Weapon Leveling (BO7) — pro players run the Endgame steps and stack the Double XP for fast combat-rating and prestige progress.
- CoD Camo Unlocks (BO7) — get the triple Glitch Boss clear done and the End of Dayz animated mastery camo unlocked for you.
- CoD Calling Cards & Challenges Boost — unlock the "To the Grave" animated calling card and other Endgame challenge rewards.
- All Call of Duty Services — leveling, camos, ranked, and carries across BO7, BO6, and Warzone.
Every service runs on real, hand-played progress on your account — no risky third-party tools — so the camo, the skins, and the calling card stay yours.
Frequently Asked Questions
What is Operation King Killer in Black Ops 7? It's the fourth and final Endgame operation of Season 4, released with the Season 4 Reloaded update on June 25, 2026. It's a 10-step challenge chain that starts in Zone III, escalates into Nightmare Zones, and ends with the Prime Target Glitch Boss fight, unlocking this season's best cosmetics.
How do you unlock the End of Dayz animated camo? You must beat the Prime Target Glitch Boss three times, once each as Samuels, Wei Lin, and Emma Kagan, to earn all three "Data Freeze" Operator skins. Earning one skin unlocks the "End of Daze" camo; earning all three unlocks the "End of Dayz" animated mastery camo.
How many steps does Operation King Killer have? Ten. Steps 1–4 are in Zone III, Steps 5–7 in Zone IV, and Steps 8–10 in Nightmare Zones, finishing with the Prime Target Glitch boss step.
How hard is the Prime Target Glitch Boss? It's a Nightmare-difficulty encounter with multiple enemy waves before the boss, tuned around a coordinated squad. Save your strongest Scorestreaks for the boss phase, focus Elite and Special enemies during the waves, and stagger revives — soloing it is possible but very punishing.
Can you do Operation King Killer solo? Technically yes, but the Zone IV and Nightmare steps — especially the Glitch Boss — are built for a full squad. Most players clear it far more reliably as a team, and matchmaking into Nightmare Zones with others is recommended.
Is Operation King Killer leaving the game? As the final operation of Season 4, it will rotate out when the next season's content launches. The exact off-date follows the next major seasonal update, so lock in End of Dayz and the Glitch Step rewards before then.
