If you’ve been grinding The First Descendant’s PvE missions, you’ve almost certainly run into the Pyromaniac boss fight by now. This fire-wielding menace hits hard, spams area-of-effect attacks nonstop, and can wipe an entire squad in seconds if you don’t know his patterns. I wiped seven times on my first four runs before I figured out the small, easy changes that make this fight trivial. If you’ve spent the last hour dying to random fireballs or unbreakable shields, you’re not alone—most new players struggle to figure out how to defeat Pyromaniac The First Descendant on their first few attempts. This guide uses tested, real-run strategies that work for both solo and squad play, no paid cosmetic or premium gear required.
Pre-Fight Loadout Prep for Beating Pyromaniac The First Descendant
The first rule to defeat Pyromaniac The First Descendant is to leave all fire-focused gear in your storage before you queue for the mission. Pyromaniac is 100% immune to fire damage, so any fire weapons or abilities you bring will do nothing but tickle him, even if they’re fully upgraded. Cold damage is your highest priority for this fight, as it deals 2x base damage to him and slows his attack speed by 15% when you land consistent hits.
For modules, you want to stack fire resistance modules at +40% or higher first, then cooldown reduction for your abilities, then max health if you have extra slots. Even with 40% fire resist, a direct hit from his big attacks will still take half your health, so don’t skip this step. For character picks, Viessa is the best option for both solo and squad play, as her built-in cold abilities can freeze Pyromaniac for 2 seconds whenever he charges a high-damage attack. If you don’t have Viessa unlocked, Freyna works well too, as her passive shield regen lets you tank small hits without wasting healing items.
Phase 1 Pyromaniac Fight Breakdown & Key Dodge Patterns
Phase 1 triggers when you first enter the arena, and lasts until Pyromaniac drops to 60% of his total HP. He only has four core attacks in this phase, and all of them are easy to dodge once you learn the telltale animations. Don’t get greedy with DPS in this phase—most deaths happen when players try to finish a full mag instead of dodging an incoming attack. His main attacks are:
- Fireball Barrage: He throws 5-7 slow-moving fireballs that leave burning pools on the ground. Dodge sideways instead of back to stay in DPS range while avoiding damage.
- Flamethrower Sweep: He leans forward and sprays fire in a 180-degree arc in front of him. Hide behind one of the concrete pillars on the edge of the arena to avoid this entirely, and use the time to reload or heal.
- Charge Attack: He lowers his shoulder and runs directly at the nearest player. Sidestep at the last second, then unload 2-3 seconds of damage into his back, which is a weak point that takes 2x damage.
- Flame Aura Burst: His body glows bright red for 3 seconds before releasing a small AOE fire burst around him. Back up 5 meters immediately when you see the glow, you’ll take 70% of your health if you get hit by this.
I lost three runs in a row because I thought I could get one more headshot in before the Flame Aura Burst went off, so don’t make that same mistake. If you stay at mid-range and focus on dodging first, you’ll get through phase 1 without using any revives in most cases. The pillars around the arena are your best friend here—they block all of his projectile attacks, so use them whenever you need a quick break to heal or reload.
Phase 2 Combat Tips to Cut Through Pyromaniac’s Defenses
Phase 2 triggers as soon as Pyromaniac hits 60% HP. He rips off his heavy protective jacket, gains 20% more movement speed, hits 30% harder, and gains two new mechanics that catch most new players off guard. The first thing he does when phase 2 starts is unleash a full arena-wide fire AOE that lasts 5 seconds. Hide behind the sturdiest pillar you can find for the full 5 seconds—don’t try to tank this even with max fire resist, it will one-shot most undergeared players.
His new core attack in phase 2 is the leap slam: He jumps high in the air, and a red circle appears on the ground where he’ll land. Move out of the circle immediately, because the impact leaves a burning pool that lasts 10 seconds and deals damage over time to anyone who stands in it. Most players who struggle to defeat Pyromaniac The First Descendant fail because they don’t prepare for the phase 2 fire shields that trigger at 40% and 20% HP. These shields block all damage except cold, so this is where your cold weapon becomes non-negotiable. If you don’t have cold damage, you’ll be stuck waiting for the shield to wear off for 2 full minutes, and he’ll spam attacks nonstop while you wait. I once queued with a random player who only brought fire weapons, and we had to abandon the run entirely because we couldn’t break the first shield.
Once the shield is broken, focus all your fire on the exposed orange fuel tank on his back—this is his new weak spot, and it takes 3x damage from all sources. If you hit it consistently, you can drop his HP from 40% to 0 in less than a minute, even with average gear.
Squad Play Adjustments for Multiplayer Pyromaniac Runs
If you’re running this fight with 2 or 3 other players, you can optimize the fight to finish in half the time of a solo run, as long as you coordinate a little before you enter the arena. If you’re coordinating with friends to defeat Pyromaniac The First Descendant, assign roles before you start the mission. Pick one player to be the kite: they deal small, consistent damage to draw Pyromaniac’s aggro, and run around the edge of the arena dodging attacks. The other 1 or 2 players can stay behind him at all times, focusing all their damage on his weak spot to burn through his HP fast.
Make sure no two players are standing close together at any point during the fight. Pyromaniac’s fireball barrage targets every player in the arena, so if you’re standing next to a teammate, you’ll end up with overlapping burning pools that cover half the arena and leave you nowhere to stand. If a teammate goes down, don’t rush to revive them immediately. Wait until Pyromaniac is in the middle of a long animation, like the flamethrower sweep or the leap slam, so you don’t get hit mid-revive and both go down.
For solo players, make sure you have at least one self-revive module equipped before you enter the arena. It’s easy to get caught off guard by a random fireball you didn’t see coming, and a self-revive will save you from having to restart the entire run. Viessa is still the best pick for solo play, as her freeze ability can stop Pyromaniac mid-attack whenever you need a quick break to heal or reload.
This fight feels impossible the first few times you try it, but it’s far easier once you learn the small patterns and small prep steps that make all the difference. The two biggest mistakes you can make are bringing fire damage instead of cold, and getting greedy with DPS instead of prioritizing dodges. If you avoid those two mistakes and follow the steps laid out in this guide, you’ll be able to beat him on your next run, even if you’re running undergeared. Once you master these small details, learning how to defeat Pyromaniac The First Descendant becomes far easier than you might expect, and you’ll be farming his rare drop modules in no time.