Tenet Arca Plasmor

The Gamma Launcher | Tenet Arca Plasmor

by last updated 3 months ago


Custom variant of a Corpus classic. Staggering blasts now ricochet and have greater range at the cost of a slower fire and reload speed. Surviving enemies are consumed with radiation.




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Tenet Arca Plasmor builds
Builds by UltimoFive

The Gamma Launcher | Tenet Arca Plasmor

Hello everyone,

My name is UltimoFive and today we are going over the [Tenet Arca Plasmor], The Gamma Launcher.

Weapon Information

  • The [Tenet Arca Plasmor] is the Tenet Version of the [Arca Plasmor] and is obtained by either vanquishing a Sister of Parvos or trading from a player a Sister that they already conquered.

  • The [Tenet Arca Plasmor] has a max rank of 40. In order to obtain this level, the player must Forma the weapon at least 5 times. Due to this feature, the player gains a total of 4,000 Mastery Points rather than 3,000. However, the builds in this guide only require 2 Forma.

  • The [Tenet Arca Plasmor] excels in Close to Medium Range Combat, dealing with High Leveled enemies of all faction in Small to Large Crowds.

Tenet Element Recommendation

With this weapon the player gets an option of having a Bonus Tenet Element, which caps at 60% based of the Progenitor Warframe you choose to spawn the Sister of Parvos.

My recommended Tenet Element would be:

  • Toxin - Toxin deals 50% base damage per second over 6 seconds and stacks indefinitely with each instance having its own timer.

Comparison to the Original Arca Plasmor

The Tenet Arca Plasmor had some buffs when compared to the original Arca Plasmor. These stats would be:

  • Higher Base Damage at 760.0 Vs. 600.0

  • Higher Critical Multiplier at 2.0x Vs. 1.6x

  • Higher Status Chance at 34% Vs. 28%

  • Longer Linear Damage Falloff start and end at 18 meters - 36 meters Vs. 10 meters - 20 meters

  • Lower Fire Rate at 1.0 Rps Vs. 1.1 Rps

  • Slower Reload Speed at 3 Seconds Vs. 2.8 Seconds

Advantages Vs. Disadvantages


  • High Critical Chance at 22%

  • Average Critical Multiplier at 2.0x

  • Very High Status Chance at 34%

  • High Base Damage at 760.0


  • Slow Reload Speed at 3.0 Seconds

  • Has Linear Damage Falloff from 100% to 33.33% at 18 meters to 36 meters

  • Slow Fire Rate at 1.0 Rps

  • No Headshot Bonus Damage


Corpus: Total Damage - | Average Hit - | Burst DPS - | Sustained DPS - | Tested up to Level 150

The Elements for the Tenet Arca Plasmor against the Corpus will be Radiation/Toxin. Radiation causes enemies to attack each other while dealing 100% additional damage to the allied for 12 seconds. Meanwhile, Toxin deals 50% base damage per second over 6 seconds and stacks indefinitely with each instance having its own timer. The Build's Flex Slot is [Contagious Spread] or Shotgun Spazz and is perfect. I was actually planning on revisiting the [Arca Plasmor], but when this got announced I was so excited. This weapon completely melts the Corpus away like they were nothing, except for those in the Index due to their heavier Armor. However, they can still be killed rather easily.

Corrupted & Grineer: Total Damage - | Average Hit - | Burst DPS - | Sustained DPS - | Tested up to Level 150

The Element for the [Tenet Arca Plasmor] against the Corrupted & Grineer will be Viral. Viral amplifies health damage by 100% for 6 seconds and stacks up to 10 times for a total of 325%. The Build's Flex Slot is Shotgun Spazz and is great! I orginally wanted to use Radiation/Corrosive, but after testing with [Hunter Munitions] it was kind of bad to go with the other choice. Viral with the Occasional Slash proc turns this Shotgun into an amazing Corrupted and Grineer Killer and is a blast to use.

Infested: Total Damage - | Average Hit - | Burst DPS - | Sustained DPS - | Tested up to Level 150

The Element for the Tenet Arca Plasmor against the Infested will be Gas. Gas deals 50% base damage per second for 6 seconds in a 3-meter radius and stacks up to 10 times for a total of 6 meters. The Build's Flex Slot is [Scattering Inferno] and is great. This is another one of those instances where I was going to choose a different Element Combination, but after seeing how well Gas worked, I couldn't say no. Seriously...2-4 shots to take out an entire squad is pretty insane!

Galvanized Builds

With the Release of Galvanized Mods alterations can be made to these builds for those who want to take the weapon further beyond with stacking. All Elements will stay the same for each Faction. However, it will require an Extra Forma. The Two mods to be Replaced would be [Galvanized Hell] in order to help stack Multishot and increase overall Damage and [Galvanized Acceleration] in order to really extend Projectile Speed and make it so Damage Falloff is farther.

Recommended Alternative Mods

  • Ravage - In place of Primed Ravage if you don't have it.

  • Point Blank - In place of Primed Point Blank if you don't have it.

  • Cleanse Mods - In place of their Primed Counterparts if you don't have them.

  • Frigid Blast or (Primed) Chilling Grasp - In place of Chilling Reload if you are okay with the Slower Reload Speed and want more Status Chance instead or more Viral Damage.

  • Shrapnel Shot - In place of the Build's Cleanse Mod if you don't like using Faction Mods.

  • Seeking Fury or Seeking Force - In place of the Build's Flex Slot if you want Punch Through, which can assist in killing off Larger Crowds.

Synergy with Tenet Arca Plasmor

There are several ways to enhance Critical Stats and Damage for this weapon:


  • Rhino's Roar adds bonus damage.

  • [Nova]'s Molecular Prime makes all sources of damage increase by 100% against primed enemies, on top of that they will detonate upon death dealing blast damage.

  • Mirage's Eclipse mixed with her Hall of Mirrors adds a massive damage bonus during the day or in light.

  • Saryn's Toxic Lash mixed with her Spores abilities.

  • Equinox's Rest & Rage in Day Form makes targets more vulnerable to Damage.

  • Wisp's Haste Reservoir bolsters fire rate, in turn increasing DPS.

  • Chroma's Vex Armor when Health gets damaged increases Weapon Damage.

Critical Stats:

  • Harrow's Covenant can add up to 50% Critical Chance and 200% on headshots.

  • Volt's Electric Shield when shot through adds a 200% Critical Damage Multiplier.

  • Zephyr's Passive increases Critical Chance by 150% while airborne.

  • Adarza Kavat with Cat's Eye can give a 60% Critical Chance boost.

  • Smeeta Kavat with Charm can give a 200% Crit Chance.

Arcane Synergy

  • Arcane Rage - Upon getting Headshot, 15% chance for 180% Damage to Primary Weapons for 24 seconds.

  • Arcane Avenger - Upon being damaged, 21% chance for 45% Critical Chance for 12 seconds.

  • Arcane Primary Charger - On Melee Kill, 30% chance for 300% damage to Primary Weapons for 12 seconds.

  • Arcane Arachne - On Wall Latch, 150% Damage for 30 seconds.

Primary Arcane

  • Primary Merciless - On Kill 30% Damage for 4 seconds, which stacks up to 12 times and comes with 30% Reload Speed and 100% Max Ammo. This Arcane I would say is more beneficial to the [Tenet Arca Plasmor] due to its Slow Reload Speed and Low Ammo Capacity. However, alternatively if one doesn't want to use this Arcane, than use Primary Deadhead and just be aware that Headshots are a bit hard sometimes with this Shotgun.

Riven Synergy

When you get your hands on a Riven for this weapon the Flex Slot to replace will be what was previously discussed before. This can require 1 more Forma and in order to maximize Damage output with Tenet Arca Plasmor, one will need to get lucky and get some nice stats. These stats would be:

  • Ideal Stats - The Ideal Stats would be; Damage, Critical Chance, Critical Damage, and Negative Weapon Recoil.


If you guys enjoyed and liked the build make sure to give it a ⭐ to help out! To help out even more, why not check out my channel where I not only make guides and builds, but also stream games, make Playthroughs, and more!

Link for my Channel 🠖

See you guys on the next guide!