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Umbral Fiber is the Umbra variant of Mod TT 20px Steel Fiber, increasing a Warframe's armor and DmgTauSmall64 Tau resistance to Sentients.

The other mods of this set are Mod TT 20px Umbral Intensify and Mod TT 20px Umbral Vitality.

Stats[]

This mod is part of a set, whose set bonus increases with each additional mod equipped from that set.

Umbral Set: Enhances the primary values of other mods in the set.

Rank Effect (Rank 1) Effect (Rank 2) Effect (Rank 3) DmgTauSmall64 Tau Resist (Rank 1) DmgTauSmall64 Tau Resist (Rank 2) DmgTauSmall64 Tau Resist (Rank 3) Cost
0 +9% +11.7% +16.2% +1% +1.3% +1.8% 6
1 +18% +23.4% +32.4% +2% +2.6% +3.6% 7
2 +27% +35.1% +48.6% +3% +3.9% +5.4% 8
3 +36% +46.8% +64.8% +4% +5.2% +7.2% 9
4 +45% +58.5% +81% +5% +6.5% +9% 10
5 +55% +71.5% +99% +6% +7.8% +10.8% 11
6 +64% +83.2% +115.2% +7% +9.1% +12.6% 12
7 +73% +94.9% +131.4% +8% +10.4% +14.4% 13
8 +82% +106.6% +147.6% +9% +11.7% +16.2% 14
9 +91% +118.3% +163.8% +10% +13% +18% 15
10 +100% +130% +180% +11% +14.3% +19.8% 16
  • Note that "(Rank #)" refers to how many Umbral Set mods are equipped at once.

Notes[]

  • This mod is given at the penultimate mission of The Sacrifice, automatically ranked to level 5. Additional unranked mods can be bought from Cephalon Simaris for ReputationLarge 100,000.
  • Umbral Fiber is essentially the Mod TT 20px Steel Fiber mod with Legendary rarity. It is considered the same mod as its Common counterpart, and thus both mods cannot be equipped together.
  • The set bonus for Umbral Fiber increases the armor given by the mod by 30% of mod's value when using 2 set pieces and 80% when using 3. At max rank with full set bonus, Umbral Fiber grants an armor increase of 180%, and increases Sentient damage resistance by 19.8%.
    • Resistance values in the above stat table are calculated based on set bonus values, displayed values are rounded to the first decimal place ingame.
    • Unlike Umbral Fiber and Mod TT 20px Umbral Vitality, Mod TT 20px Umbral Intensify's stats only increase by 25% and 75% due to set bonuses instead of 30% and 80%.
  • This mod outperforms Steel Fiber from rank 8 when using 2 set pieces and from rank 6 when using 3.
  • Umbra mods have a unique Umbra Pol polarity, whose matching polarity can currently only be found on Excalibur UmbraIcon272 Excalibur Umbra, Exalted Umbra Blade, and the Skiajati Skiajati. It is possible to (re-)add a Umbra Pol polarity to a mod slot but only through the use of Umbral Forma, which can be obtained either directly, from Nightwave, or built with blueprints purchasable once every 8 weeks with Steel Essence. Given the extremely limited rate of acquisition, it is advised not to re-Forma any mod slot with an Umbra Pol polarity.

Patch History[]

Update 34.0 (2023-10-18)

Base vs Final Stats in Modding - Health / Energy / Shield / Armor Stat Overhaul

If you’ve spent any time invested in the deeper nuances of Modding, you may be familiar with “Warframe Math” - math that upon first glance doesn’t really make sense, but once you learn the inner workings of the game, it all comes together. While we can appreciate the value that complex systems offer to a certain subsect of players, there are other aspects of the game that should have clear and understandable outcomes. Namely: Shield, Health, Energy, and Armor Modding.

Pop quiz: what is 300 + 440%? If you answered 740, you may just be an Excalibur player.

Vitality (+440% Heath), Redirection (+440% Shields), Flow (+150% Energy), and Steel Fiber (+110% Armor) come with large modifier values that don’t seem to match their outcome in-game. This is because these Mods apply their multiplier to the base stats of the Warframe - i.e., the stats you have at Rank 0. In the Excalibur example, a Rank 30 Excalibur’s Health stat of 300 earns an additional 440 Health from max rank Vitality (+440% Heath) since it applies to his base rank Health stat of 100, resulting in 740 total health.

In this update, we have removed this obfuscation by having Health, Shield, Energy, and Armor Mods apply to the stats of Warframes at their current rank. Continuing our Excalibur example, instead of Vitality always applying to Excalibur’s base rank 100 Health, it would apply to his Health stat based on his rank - namely, the stat you can actually see in your Arsenal. If your Excalibur were Rank 30, his Health stat would be 300, which means Vitality’s multiplier would be calculated off of 300.

With previous Health and Mod values, additional adjustments are needed to make this revision work while maintaining game balance. By only changing where the multiplier applies, a Rank 30 Excalibur would receive an extra 1,320 Health from max rank Vitality, resulting in a total health stat of 1,600. This outcome is a significant buff, which is not the intention of this system change.

To remedy this, we approached this problem in two ways:

1 - We reduced the overall multiplier for Health, Shield, Energy, and Armor Mods.
Since these now affect Max Rank Warframe stats, these Mods need to scale differently to maintain the status quo. Additionally, we wanted these new values to be as clear and understandable to all players as possible! Here are a few examples of these value changes:

  • Vitality: Reduced from +440% to +100% Health
  • Redirection: Reduced from +440% to +100% Shield Capacity
  • Steel Fiber: Reduced from +110% to +100% Armor
  • Flow: Reduced from +150% to +100% Energy Max

Doing some quick math, this means that a Rank 30 Excalibur (300 Health) with a reworked Vitality Mod (+100% Health, applied to the final Health stat) would receive 300 extra Health, for a total of 600. That, in contrast, is a nerf, which we also don’t want to do.

So, our next step:

2 - We adjusted Warframe Health, Shield, Energy, and Armor values to keep the end result of the revised Mods as close to the original values as possible.

With this change, Excalibur’s Rank 30 Health stat is 370. With +100% Health from a max Vitality Mod, his resulting Health stat would be 740, which matches what it was originally.

While this path to the same result may seem a little complicated, the outcome matches our intention: we want players to be able to look at their Health, Shield, and Armor Mods, and be able to understand how they affect the stats they see in their Arsenal.

In addition to everything above, we also increased the base stat values for Warframes so that these revised Mods offer similar value for lower-ranked Frames. To do so, we reduced the amount of Health/Shield/Energy that Warframes earn per rank in half, and transferred the sum of that value to their base stats.

Warframe Mod Changes:

  • Umbral Fiber: +100% (was +110%)
    • +130% and +180% with set bonuses (was +137.5% and +192.5%)
    • The 2-Mod set bonus for Umbral Fiber is more substantial than it was before, so builds that use Umbral Fiber and only one other Umbral Mod should see a buff to their Armor stat.

Hotfix 30.0.6 (2021-04-20)

  • Fixed cases of Tau Resist not reducing damage against Sentients at all.

Update 28.0 (2020-06-11)

  • Added the Umbra mods to Simaris’ store Offerings (available after The Sacrifice Quest completion)

Update 23.2 (2018-08-02)

  • Fixed Mod sets (Umbral, etc) not updating all values when equipping/unequipping Mods.

Hotfix 23.0.1 (2018-06-15)

  • Mod is now link-able in chat. (Undocumented)

Update 23.0 (2018-06-15)

  • Introduced along with The Sacrifice quest.

Last updated: Hotfix 23.0.1 (2018-06-15)

See also[]

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