Greylorm Boss Fight Guide for the Competitive Gaming

The Forbidden Summoning World Event in Black Ops 7 Endgame has become one of the most talked-about challenges of 2025. Whether you're grinding solo or coordinating with a squad, defeating Greylorm, the Aether Worm, demands real preparation, sharp execution, and a clear understanding of the encounter's mechanics. At SkinMarket, we break it all down so you can walk in confident and walk out loaded with rewards.

What Is the Forbidden Summoning World Event?

The Forbidden Summoning is a limited-time World Event that appears in specific zones across Black Ops 7 Endgame's map. When the event triggers, a dimensional rift opens and Greylorm, a colossal Aether Worm, emerges to challenge any squad brave enough to engage. Successfully completing the encounter rewards players with high-tier loot, exclusive cosmetics, and meaningful XP progression.

Unlike standard encounters, the Forbidden Summoning has strict timers and phase-based mechanics that punish passive play. Understanding the event's cadence before you drop in is the difference between a clean clear and a full squad wipe. SkinMarket has tested this encounter extensively so you don't have to learn the hard way.

Preparing Your Loadout Before the Fight

Greylorm is resistant to a number of common damage types, so arriving with a poorly optimized loadout will cost you precious time during the fight. High-damage energy weapons and explosives with area-of-effect properties perform best against the worm's exposed segments during its vulnerable phases. Avoid relying on sustained fire from light weapons, as Greylorm's armor plating absorbs a significant portion of that damage.

Equipment selection matters just as much as your primary weapon. Deployable cover and proximity mines help manage the swarms of lesser Aether creatures that Greylorm summons between phases. Stock up on healing items and make sure at least one squad member carries a revive-focused support build. Arriving underprepared is the single most common reason squads fail this event.

Phase One — Breaking the Shell

When Greylorm first emerges, it is fully armored and largely immune to direct damage. Your first objective is to destroy the glowing carapace nodes located along its mid-section. These nodes pulse with a faint blue light and appear in groups of three. Focusing fire on each node cluster in sequence will crack the outer shell and expose the worm's vulnerable core.

During this phase, Greylorm sweeps the arena with a tail slam that covers roughly 40% of the combat zone. Staying mobile and reading the wind-up animation is critical — the slam telegraphs about 1.5 seconds before impact. Players who position near the edges of the arena can avoid the sweep entirely while maintaining line-of-sight on the carapace nodes.

Phase Two — The Aether Surge

Once the shell is broken, Greylorm enters its Aether Surge phase, during which it channels energy and becomes temporarily stationary. This is your primary damage window and the most important 20 to 30 seconds of the entire encounter. Unload your highest-damage abilities and weapons directly into the exposed core, which is now visible on the worm's underside.

The catch is that Greylorm's Aether Surge also spawns waves of Aether Drones that target players aggressively. Splitting squad roles here is essential — designate one or two players as drone control while the rest focus on the core. Failing to manage the drones will result in sustained damage that drains your squad's health pool before the core can be destroyed.

Phase Three — Enrage and Final Push

If Greylorm's core survives the Aether Surge window, the worm re-armors and enters its Enrage state. In this phase, all of Greylorm's attacks deal increased damage and its movement speed roughly doubles. The carapace nodes return, but they now require significantly more focused fire to destroy and cycle through faster.

The Enrage phase is where many squads fall apart. Staying calm, maintaining communication, and cycling through your squad's cooldowns efficiently is what separates experienced players from casual ones. This is the kind of high-pressure scenario that mirrors what players face in an esports arena, where composure under stress determines outcomes. Treat the Enrage phase as a test of your squad's coordination, not just your individual damage output.

Maximizing Rewards and Loot Efficiency

Completing the Forbidden Summoning on your first attempt — without any squad members being eliminated — triggers a bonus loot drop that significantly increases the quality of rewards. This includes a chance at exclusive Endgame-tier weapon blueprints and cosmetic items that are not obtainable through any other activity in 2025's current content cycle.

For players active in online tournaments or tracking their performance across a gaming platform, the Forbidden Summoning completion stat is increasingly being used as a benchmark for squad skill. SkinMarket recommends recording your runs for review, both to identify mechanical errors and to build a portfolio of high-level play that can support your reputation in competitive gaming communities.

Squad Coordination Tips for Competitive Players

Greylorm is a fight that rewards structured team play above all else. Before entering the event zone, assign clear roles: a primary damage dealer, a drone control specialist, a support player, and a flex player who adapts to whatever the encounter demands. Clear role assignment eliminates hesitation during the most chaotic moments of the fight.

Communication tools matter here. Using in-game pings effectively, pre-establishing callouts for each phase transition, and agreeing on a retreat protocol if the fight goes sideways will all improve your squad's consistency. Players who treat this encounter with the same discipline they bring to competitive gaming will find their clear times dropping significantly run over run. SkinMarket has seen squads cut their average clear time by over 30% simply by implementing structured pre-fight briefings.

Conclusion

The Forbidden Summoning World Event featuring Greylorm is one of Black Ops 7 Endgame's most rewarding and mechanically demanding encounters in 2025, requiring well-optimized loadouts, phase-specific strategies, disciplined squad coordination, and the kind of composure under pressure that defines high-level competitive gaming — and by following the expert breakdown provided by SkinMarket, players at every skill level can approach this fight with confidence, execute each phase cleanly, and walk away with the premium rewards this event has to offer.

Frequently Asked Questions

What is the Forbidden Summoning World Event in Black Ops 7 Endgame?

It is a limited-time encounter in which the Aether Worm Greylorm emerges from a dimensional rift, challenging squads to defeat it across multiple phases in exchange for high-tier rewards.

How many phases does the Greylorm boss fight have?

The fight has three distinct phases: the Shell phase, the Aether Surge phase, and the Enrage phase, each requiring different tactics and squad priorities.

What weapons work best against Greylorm?

High-damage energy weapons and area-of-effect explosives perform best, particularly during the Aether Surge phase when Greylorm's core is exposed.

How do I trigger the bonus loot drop?

Complete the Forbidden Summoning without any squad members being eliminated to unlock the bonus loot drop, which includes a chance at exclusive Endgame-tier blueprints.

How long does the Greylorm encounter typically take?

A well-coordinated squad can clear the encounter in approximately four to seven minutes, depending on loadout optimization and execution quality.

Can the Forbidden Summoning be completed solo?

While technically possible, the encounter is balanced around squad play, and solo attempts are significantly more difficult due to simultaneous drone management and core damage requirements.

How often does the Forbidden Summoning World Event appear?

The event triggers on a timed rotation within specific zones; checking the in-game event tracker gives real-time information on the next scheduled appearance.

Is Greylorm relevant to competitive gaming standings?

Increasingly, completion stats for high-difficulty events like the Forbidden Summoning are being tracked on gaming platforms as indicators of squad-level skill and coordination.

What is the biggest mistake squads make during the Greylorm fight?

Arriving with unoptimized loadouts and failing to assign clear roles before the encounter are the two most common reasons squads fail to complete the event.

Where can I find more Black Ops 7 Endgame guides from SkinMarket?

SkinMarket regularly publishes in-depth guides, tier lists, and strategy breakdowns covering all major Black Ops 7 Endgame content — check the site for the latest 2025 coverage.