Build it. Six thousand standing and a straight Foundry build hand you a primary that still holds up in Steel Path as of September 2026. No Circuit spins. No adapter drops to chase. It’s not the flat-out best primary in the game anymore; newer Incarnon Genesis rifles have closed the gap. But Devouring Attrition’s non-crit scaling doesn’t care how tanky the target is, and nothing about getting this gun involves luck.
Phenmor doesn’t need a Circuit run or a weekly Genesis Adapter drop. Land 100 kills to unlock the transformation for good, then land 12 headshots (roughly 8 with the Incarnon Efficiency evolution) to charge Alt-Fire, which turns it from a 3-shot-per-second semi-auto into a 13.33-shot full-auto stream of pure Slash and Radiation.
Phenmor launched in Update 31.5 back in 2022, one of the original eight Incarnon weapons that never got folded into the Circuit rotation. That’s still true four years later. You buy it, you build it, you unlock the transformation by killing things with it. No relic runs, no waiting on the right Genesis week to line up.
Where it sits in the current meta depends on which list you read. General 2026 primary weapon tier lists still call it S-tier, the best single-target primary around. Sportskeeda’s Incarnon-specific ranking from earlier this month is more skeptical: A-tier, because newer Genesis rifles like Burston, Braton, and Boltor now out-damage it. Both are right, really. It’s not the automatic top pick it was a couple years back. Still cheap, though. Still RNG-free. Still strong enough to carry Steel Path, Archon Hunts, and Netracells.
That build guide from Rainollon is a decent watch for how the transformation actually feels in hand, even though it’s from 2025 and predates this patch. Treat the mechanics as accurate and the specific mod choices as a starting point rather than gospel. The build below reflects where the community landed for September 2026.
How to get the Phenmor
Getting Phenmor is a straight purchase, not a farm, but there’s a real wall in front of the shop. You need Mastery Rank 14 and a finished Angels of the Zariman quest before Cavalero’s Incarnon shop even appears. That same quest is what unlocks the Holdfasts syndicate in the first place, so there’s no shortcut around it.
Once you’re in, grind Holdfasts standing to Rank 2, Watcher, and buy the blueprint from Cavalero for 6,000 standing. The blueprint is tradeable, so a clanmate with spare standing can hand you a shortcut. Building it in the Foundry costs credits plus a handful of Zariman resources, including Voidplume Pinion, Voidplume Quill, Alloy Plate, and Entrati Lanthorn, with roughly a one-day build timer. Exact quantities vary slightly between sources, so check your own Foundry screen for the current numbers before committing resources.
The Incarnon transformation isn’t gated behind anything extra. No Circuit, no adapter, no waiting for a specific weekly rotation. Land 100 kills with the gun and the transformation is yours permanently.
Stats
| Class | Primary |
|---|---|
| Mastery Rank | 14 |
| Trigger | SEMI |
| Noise | Alarming |
| Fire Rate | 3 |
| Accuracy | 28.6 |
| Magazine | 30 |
| Reload | 2.8 s |
| Critical Chance | 20% |
| Critical Multiplier | 2x |
| Status Chance | 20% |
| Riven Disposition | (0.6) |
| Damage | 140 total |
|---|---|
| Puncture | 42 |
| Slash | 98 |
Riven disposition sits at 0.60, one dot out of five, among the lowest in the game. Rivens for Phenmor are cheap on the trade market because of it, but don’t expect a roll to move the needle much. Put your kuva toward a weapon with better disposition instead.
Builds
The build the community settled on is called Devouring Attrition, and it deliberately avoids crit. Evolution IV, Elemental Excess, cuts 10% crit chance on purpose, because Evolution V then gives a 50% chance per non-crit hit to land a separate 2000% damage multiplier on top of your regular damage mods. That’s why this build stacks status and multishot instead of crit chance and crit damage. Viral is the default element: Primed Cryo Rounds brings Cold, Infected Clip brings Toxin, and the two combine automatically into Viral, which doubles damage to health once a target is stacked with the status. Where a slot lists two options, take whichever version you own; the cheaper mod still does the job.
Rifle
Rifle
Rifle
Rifle
Rifle
Rifle
Rifle
Rifle| Mod | Effect |
|---|---|
| Primed Shred | +55% Fire Rate, +2.2m Punch Through. |
| Galvanized Chamber | +80% Multishot. On kill, +30% Multishot for 20 seconds, stacking up to 5 times. |
| Galvanized Aptitude | +80% Status Chance. On kill, +40% direct damage per active status type on the target for 20 seconds, stacking up to 2 times. |
| Primed Cryo Rounds | +165% Cold damage. |
| Infected Clip | +90% Toxin damage at max rank. Combines with the Cold mod above into Viral. |
| Hellfire | +90% Heat damage at max rank. |
| Amalgam Serration | +155% Damage, +25% Sprint Speed. |
| Magnetic Capacity | +60% Magnetic damage, +40% Magazine Capacity. |
Heat status procs from Hellfire strip roughly 50% armor for their duration, which matters more than the raw damage number on Grineer targets. If you’d rather trade some of that Heat damage for built-in status chance, Thermite Rounds is the swap. Malignant Force does the same trade in the Toxin slot instead of Infected Clip. For Grineer or Corrupted-heavy content, a Corrosive variant exists that swaps in Vile Acceleration, Stormbringer, and Terminal Velocity, but Viral stays the safer pick across mixed factions.
Run Primary Deadhead in the arcane slot. A headshot kill grants +120% damage for 24 seconds, stacking up to 3 times, and at max rank it also adds a passive 30% headshot damage multiplier plus 50% less recoil. It’s the consensus arcane for this weapon across current build guides.
Reviewed September 2026.
Pros and Cons
Pros
- Straight standing purchase, no Circuit spins or adapter RNG like most later Incarnon weapons need.
- The Incarnon transformation is fully built into the weapon, with a fast unlock: 100 kills, then a handful of headshots to charge.
- Devouring Attrition’s non-crit scaling holds up deep into Steel Path without needing outside armor strip.
- Cheap to build well. Deadhead and the Galvanized mods are common, and it doesn’t need a Riven to function.
- Still rated S-tier by multiple 2026 primary weapon lists and a go-to pick for Disruption demolishers and Archon Hunts.
Cons
- Riven disposition is 0.60, the lowest tier in the game, so Rivens barely move its ceiling.
- Base stats before the transformation are mediocre: 20% crit chance, 20% status chance, a 2.8 second reload, and a below-average 3.00 attacks per second fire rate.
- Sportskeeda’s current Incarnon list drops it to A-tier now that Burston, Braton, Boltor, Latron, and Miter Incarnons out-damage it.
- Sustained fire rate in Incarnon form decays from 100% down to 60% over the first 51 shots, so holding the trigger down punishes you.
- Getting there takes a while: Mastery Rank 14, a full Angels of the Zariman completion, and grinding Holdfasts to Rank 2 before you can even buy it.
Phenmor suits players who want a headshot-focused primary that doesn’t need a perfect crit roll or a lucky Riven to perform. It rewards accuracy over spray, and Devouring Attrition keeps scaling long after flat damage mods cap out. If you’re chasing the single highest DPS number on a spreadsheet, a newer Genesis rifle probably beats it now. If you want one cheap, reliable gun for headshots, Disruption, and Archon Hunts, it still earns the slot.