Welcome, wanderer. Diablo 4 has seen its share of overpowered builds, absurd interactions, and game-breaking synergies since launch—but nothing currently compares to what the Necromancer’s Bone Spirit Machine Gun can do in Season 5. This setup is so explosively strong that players are clearing Pit 100, melting Infernal Hordes, and erasing bosses in fractions of a second… all without a single mythic item.

How is this possible? Two core interactions—Unstable Power and the Shattered Spirit Aspect—have combined to create one of the most destructive build archetypes in the entire game. By enabling basic skills to critically strike and overpower with 100% bonus damage, and then turning every Bone Spirit cast into a barrage of high-damage Bone Splinters, this build takes what should be simple utility skills and transforms them into trillion-damage, Diablo 4 Gold.

In this article, we break down both versions of the build:

The Zero-Cooldown Machine Gun for Infernal Hordes, speed farming, and open-world chaos

The Pit-Pushing Trillion-Damage Variant for endgame ladder pushing

We’ll walk through the gameplay loop, breakpoints, Paragon pathing, and itemization details that make this build function—and explain why it is currently one of the strongest (and most fun) Necromancer setups in the game.

Why This Build Works: The Two Overpowered Pillars

1. Unstable Power — Basic Skills Go Nuclear

The Chaotic perk Unstable Power flips Necromancer fundamentals upside down. It allows your basic skills to:

Critically Strike

Overpower

Deal 100% bonus damage

Do this every single cast

The only drawback is that this buff applies a 3-second cooldown to your basic skills—which sounds restrictive until you realize the build spams Bone Spirit so fast that Bone Splinters pour out constantly. Those splinters inherit the explosive critical/overpower effects, meaning every cast turns into a miniature nuke.

2. Shattered Spirit — The Aspect That Breaks Everything

The Shattered Spirit Aspect is the real star:

Casting Bone Spirit launches 18 Bone Splinters that gain up to 900% bonus damage.

Even the "weaker" 400% version lets players already clear Pit 100 and comfortably farm endgame. A perfect roll would push this far beyond, easily reaching double-digit trillions of damage per splinter.

Together, these two interactions create a runaway loop where Bone Spirit constantly fires, Bone Splinters explode in every direction, and entire packs evaporate in less time than it takes to blink.

The Gameplay Loop — Simple, Brutal, Effective

Despite being mechanically complex behind the scenes, the playstyle is beautifully straightforward:

Activate Bonestorm

This gives critical strike chance, adds extra bone storms, and sets up huge bonus crit damage through certain aspects.

Jump into a pack

Mobility is only needed to get in range—after that, the build does the rest.

Hold down Bone Spirit

If your breakpoints are met, this becomes a literal machine gun.

Corpse Tendrils to cluster mobs

Everything gets grouped into a kill zone.

One single Reap

This triggers Gospel of the Devote, which empowers your basic skills and massively boosts Bone Splinter damage, giving them piercing capability for Pit-pushing efficiency.

Once activated, you simply spin, move, and watch the trillions rack up. Every Bone Spirit fires a cascade of splinters that pierce enemies, chain across rooms, and delete entire waves.

Build Variant #1: The Pit-Pushing Trillion-Damage Version

This is the easier version to assemble and the more powerful one for single-target nuking and clearing high-tier Pits. You must hit two essential breakpoints:

Breakpoint #1: 100% Critical Strike Chance

Bone Spirit reduces its cooldown by 7 seconds on a crit—so you must crit every cast. You get this from:

Base crit + gear

+10% from Ghastly Bone Spirit

+20% from active Bonestorm

Tempered Bone Critical Strike Chance (multiple sources)

Additional bone-skill crit rolls

Add them together and you land at or slightly above 100%.

Breakpoint #2: Bone Spirit at a 7-Second Cooldown

Once Bone Spirit hits a 7-second cooldown, crits instantly reset it. You get there using:

Pain Gorger’s Gauntlets (12% CDR + ranks to basic skills)

Rapid Ossification (CDR tied to Essence spent)

Crown of Lucion (CDR & stacking damage)

Additional tempering

Rapid Ossification is key: every 100 Essence spent reduces Bone skill cooldowns by 1.5 seconds. With 191 Essence, you always generate enough to guarantee this reduction.

Why This Version Is So Strong

Every Bone Spirit crit resets cooldown

Every reset triggers 18 high-damage splinters

Every splinter pierces (once buffed by Reap)

Entire packs evaporate instantly

Bosses melt under trillions of overlapping hits

With optimized gear, this version becomes a Pit-destroying monster.

Build Variant #2: Zero-Cooldown Bone Spirit Machine Gun

This version sacrifices maximum damage for unmatched farming convenience. Instead of relying on crit resets, you push cooldown reduction so low that Bone Spirit becomes essentially spammable, even when nothing is hit.

Target Cooldown: ~4 seconds

If Bone Spirit lands at or below 4 seconds, premium CDR plus Rapid Ossification lets you fire endlessly.

You reach this by stacking:

CDR on helmet

CDR on gloves

CDR on off-hand

CDR on chest

CDR through Crown effects

Greater affixes where possible

Triple-masterworked Rapid Ossification (optional but amazing)

Why Use This Version?

Best for Infernal Hordes, Helltides, and open-world farming

No reliance on targets → you can spam even in empty areas

Extremely smooth gameplay

Slightly lower maximum damage but still in the multi-billion range

You can simply stand in the center of an Infernal Horde, hold down the button, and watch Bone Spirits explode outward in every direction like a divine minigun.

Key Gear Highlights

Pain Gorger’s Gauntlets

+8 ranks to basic skills (huge splinter damage)

CDR

Must-have for both versions

Crown of Lucion

Up to 90%–100% damage multiplicatively when fully stacked

Makes resource-spending skills significantly stronger

Lidless Wall

Not mandatory, but extremely strong:

Generates extra Bonestorms

+20% crit damage per Bonestorm (up to 100%)

Ensures Bonestorm uptime is basically permanent

Gospel of the Devote

This turns Reap into a piercing, build-enabling buff:

+40% damage to other basic skills

Allows Bone Splinters to pierce, which is essential for Pit pushing

Fist of Fate

Provides Lucky Hit and reliable vulnerability application.

Skill Tree Overview

Only the essentials:

Core Priorities

Max ranks in Bone Splinters

More Essence nodes for increased damage and resource flow

Shadow damage nodes (because of Decaying Humorous aspect)

Curse-based damage multipliers

Corpse Tendrils for grouping and blood orb generation

Bone Spirit at only 1 point (since damage comes from aspects)

Bonestorm at 1 point

Important Passives

Stand Alone

Memento Mori

Inspiring Leader (+crit chance)

Necrotic Fortitude (fortify + surviveability)

Ossified Essence (+damage at full resource)

Paragon Board Pathing

This is where the build skyrockets in power. The must-have glyphs and boards include:

1. Wither Board + Eliminator Glyph

Huge Shadow damage boost

Bone Spirit & Splinters both scale

2. Bloodbath Board + Gravekeeper Glyph

Massive Overpower scaling

Works beautifully with Bonestorm multipliers

3. Bone Graft Board + Essence Glyph

Adds a ton of maximum Essence

Higher essence = more damage from Ossified Essence

Enables Rapid Ossification breakpoints

4. Frailty Board + Dominate Glyph

Attack speed

Overpower scaling

More Spirit → more Splinters → more carnage

Once finished, the boards create a web of multipliers that exponentially scale Bone Splinter and Bone Spirit damage buy Diablo IV Gold.

Final Thoughts: One of the Most Satisfying Builds Ever Made

Whether you choose the pit-pushing, trillion-damage eruption build or the zero-cooldown machine gun variant, this Necromancer setup might be the most rewarding and cinematic playstyle Diablo 4 has ever produced.

It’s:

Fast

Visually explosive

Resource-sustainable

Mythic-free

Endgame-viable

Easy to learn

Extremely satisfying

You hold down a single button and unleash a storm of critical, overpowering, splintering death that fills the screen with numbers so large they stop feeling real.

If you haven’t tried it yet, now is the perfect time. Diablo 4’s Season 5 Necromancer may never be this broken again.