MMOexp-Diablo 4: Infinite Bone Spirit Spam Build—Fastest Pit Farmer in the Game

 If you've ever dreamed of turning your Necromancer into a screen-clearing, boss-melting, teleport-spamming monster that deletes everything in sight, then Rob's Bone Spirit Necromancer might just be the most fun you'll ever have in Diablo 4. Designed originally by the creator "AA" and popularized through Rob's showcase, this "machine gun Necro" combines Bone Spirit, Bone Splinters, and chaos power scaling to produce absurd damage numbers-sometimes hitting hundreds of billions or even trillions of damage Diablo IV gold.

In this guide, we'll break down everything about this insane setup-how it works, what gear you'll need, how to maintain infinite Bone Spirit casts, and why this is arguably the most satisfying Necromancer build ever made.

The Concept: One Button, Full Screen Wipe

The core fantasy behind this build is simple: you press one button-Bone Spirit-and the entire screen explodes in a storm of Bone Splinters that annihilate everything. No complicated rotations. No curses. No micromanagement. Just pure destruction.

When executed correctly, this build can:

 Speed farm Pit 100 in under two minutes

 AFK through Hordes

 One-shot every boss in the game

 Teleport endlessly through maps

 Perma-crit and perma-overpower on every hit

And the best part? You can do all of that while chilling back, holding one key, and watching the screen dissolve around you.

The Engine: Bone Spirit + Bone Splinters Synergy

The magic happens thanks to a specific aspect-one that causes your Bone Spirit to cast Bone Splinters whenever it's activated.

Bone Spirit itself consumes all remaining Essence when cast, instantly spending your full resource bar. That's key, because with the right passives and cooldown reduction setup, every Essence spent reduces Bone Spirit's cooldown-meaning you can cast it infinitely.

How it works step-by-step:

1.You cast Bone Spirit.

2.Bone Spirit triggers Bone Splinters across the entire screen, creating a machine gun effect.

3.Each spike from Bone Splinters overpowers and crits automatically thanks to the Unstable Power chaos perk.

4.Every Bone Spirit cast spends all Essence, reducing its cooldown to zero via Rapid Ossification.

5.Macabre skill bonuses and Essence restoration tempers instantly refill your resource, letting you repeat endlessly.

It's a closed loop of death and energy recovery. No downtime. No cooldowns. Just endless bursts of bone shrapnel.

Core Powers and Passives

Let's go over the key mechanics that make this engine work.

1. Rapid Ossification

This passive is the cornerstone of the build. For every 100 Essence spent, your Bone skills have their cooldown reduced by up to 4.5 seconds. Since Bone Spirit consumes all your Essence in one cast, you can completely reset the cooldown every time.

2. Unstable Power (Chaos Perk)

This perk ensures all your Bone Splinter hits are guaranteed to crit and guaranteed to overpower. You don't need to worry about crit chance or overpower chance ever again-both are permanent.

3. Essence Management

With Macabre skill resource restoration on your amulet and tempering bonuses like "Macabre skills restore Essence," you'll never run dry. Add in paragon points for Essence on kill and maximum resource, and you'll maintain near-constant uptime.

4. Movement and Teleportation

By using the Mooney Jar and other mobility aspects, your teleport resets after every six casts of Bone Spirit, giving you near-infinite repositioning. The end result feels almost like a Diablo II Frozen Orb Sorceress-teleporting around while everything dies around you.

Recommended Gear Setup

Here's what the ideal endgame setup looks like. Rob's version was only partially optimized, yet still blasted Pit 100 in 90 seconds. Fully geared, it's absurd.

Helm

 Option 1: Harlequin Crest (Harle's Crest)-Great for beginners, grants cooldown reduction and bonus ranks to all skills.

 Option 2: Littlest Wall-The true endgame option, providing massive +80% main weapon damage (multiplicative) and extra Bone skill ranks.

Chest Armor

 Shroud of False Death-Amplifies resource expenditure, scaling your Bone Spirit's damage even higher.

Boots

 Littlest Wall (if not on helm) or mobility-focused boots with Cooldown Reduction and Movement Speed.

Amulet

 Compounded Fracture or Co-Scale Blood-for heavy damage multipliers.

 Roll with "Macabre skills restore Essence" and "+Maximum Resource."

Rings

 Rapid Ossification (must-have)

 Adaptability Aspect or Accelerating Chaos for extra cooldown recovery.

 Aim for high rolls on cooldown reduction and critical damage.

Weapons

 Pain Gorgers for Basic Skill damage scaling.

 Moonrise for more Basic Skill multipliers, synergizing with Bone Splinters.Chaos Powers

 Bran Over Brains-Flat damage boost.

 Accelerating Chaos-Cooldown recovery.

 Craze Brew-Boosts attack speed when you drink a potion.

 Unstable Power-Auto-crit and auto-overpower, the keystone of this build.

Even with mediocre gear (Rob mentioned using mostly 1GA rolls), this setup trivializes the hardest content in the game.

Skill Tree Breakdown

This is one of the simplest builds you'll ever play, and that's part of its charm. You only actively use two skills:

 Bone Spirit (Main nuke and trigger)

 Bone Storm (Optional for extra multipliers and AoE uptime)

Everything else is just on the bar to provide bonuses, passive synergies, or movement boosts.

Key nodes to take:

 Bone Splinters (maxed with Initiate's upgrade for Vulnerable application)

 Rapid Ossification (essential for infinite Bone Spirits)

 Ossified Essence (damage scaling based on current Essence)

 Reaper's Pursuit (movement speed from Shadow skills)

 Bone Storm (defensive layer and more Bone multipliers)

That'