Best Truly Deadly Arson Build for Season 3 – The First Descendant
Welcome to The First Descendant Truly Deadly Arson Build. This Truly Deadly Arson is updated for Season 3. A super-heated flamethrower crafted using a Pyromaniac’s core and armor. It is said to be Blair’s favorite weapon since it was made using parts of his nemesis.
Table of Contents:
You can also view our All Ultimate Weapons in The First Descendant list.
Truly Deadly Arson Summary

The Truly Deadly Arson is an Ultimate Beam Rifle. A super-heated flamethrower crafted using a Pyromaniac’s core and armor. It is said to be Blair’s favorite weapon since it was made using parts of his nemesis.
- Name: Truly Deadly Arson
- Type: Beam Rifle
- Tier: Ultimate
- Unique Ability: Double Tap, Double Check
Unique Ability “Double Tap, Double Check”
On hitting an enemy, inflicts Void Fire. When Burn is inflicted on top of Void Fire, it explodes to deal damage, then transforms Burn to the more powerful, Inferno. Inferno nullifies Void Fire. Only Fire ATK applies to this weapon. Other Attribute ATKs are converted to Fire ATK at a certain ratio.
Truly Deadly Arson Build for The First Descendant
Next, let us take a look at an optimized Truly Deadly Arson Build for The First Descendant.
Here is all the info you need to build a powerful Truly Deadly Arson:
Truly Deadly Arson Modules

Modules are an important part of every weapon build in The First Descendant.
| Module Slot | Module Name |
|---|---|
| 1 | Rifling Reinforcement |
| 2 | Action and Reaction |
| 3 | Fire Rate Up |
| 4 | Better Insight |
| 5 | Better Concentration |
| 6 | Expand Weapon Charge |
| 7 | Fire Enhancement |
| 8 | Multi-Trigger Rifling |
| 9 | Multi-Piercing Trigger |
| 10 | Superheated Plasma |
Weapon Readjustment
You can use the Weapon Readjustment at the Weapon Workbench in Albion. Here are the best Weapon Readjustments for Truly Deadly Arson:
- Firearm ATK
- Multi-Hit Chance
- Firearm Critical Hit Rate
- Multi-Hit Damage
Try to upgrade the Weapon Readjustments to at least purple quality.
Weapon Cores
Weapon Cores juice up your damage quite tremendously. However, especially the later-level Weapon Cores are difficult to get. So start with whatever weapon cores you have available. Weapon Cores drop in the Void Erosion Purge endgame activity.
Higher level Weapon Cores drop in the higher level Void Erosion Purge levels in The First Descendant. However, you can gradually work towards the highest level. I recommend trying to get to level six as soon as possible, since it won’t require to clear many stages and will already increase the power of your weapon tremendously.
Best Weapon Cores for the Truly Deadly Arson:
Fire ATK (Free Augmentation)
Fire ATK (Attribute Augmentation)
Fire ATK (Attribute Augmentation)
Fire Rate (Tactical Augmentation)
Sprint Speed (Precision Augmentation)
Flex (Special Augmentation)
Truly Deadly Arson Lore Info
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“So, I paid Anais a visit because I heard she made something really interesting, but that purple witch is completely insane.
Can you believe that she used parts that were salvaged from a Pyromaniac before it disintegrated to make a flamethrower?
This weapon is crazy, I can’t believe I’m even saying this.
It doesn’t spew out regular napalm, it spews out real Void Fire concentrated in the core of a Colossus! It’s almost like you’re holding and firing me!
What’s even more crazy, is when you shoot real fire at something that’s already covered in Void Fire! BANG!
Everything goes woosh! It’s an instant barbeque!”
“So… you tried to heat up my dinner with that flamethrower… and ended up burning it?”
“Sorry about that, Turret Boy. But it was one hell of a flame show. Just have a drink.”
“…”
– Blair, showing off his new weapon to Jayber…
Related Guides for The First Descendant
You can also check out our Ultimate Weapons Database for The First Descendant or the Builds Database for The First Descendant.
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