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How to Get Umbral Fiber in Warframe (2026): Where It Drops, Stats and Is It Worth It
At max rank, this mod increases Warframe armor by 100% and Sentient damage resistance by 11%, with set
Last Updated on September 14, 2026
The short answer
Umbral Fiber is a legendary warframe mod: At max rank, this mod increases Warframe armor by 100% and Sentient damage resistance by 11%, with set bonuses increasing these to 180% armor and 19.8% Sentient damage resistance when three Umbral mods are equipped. Complete The Sacrifice quest to obtain the mod automatically. Armor that grows with the set.
Reviewed September 13, 2026, current through Update 43.5. Stats are max rank from the live game data, drop chances from the official drop tables; this page is re-checked after every major patch.
| Mod facts | |
|---|---|
| Slot | Warframe |
| Rarity | Legendary |
| Polarity | Umbra |
| Drain at max rank | 16 (rank 10) |
| At max rank | +100% Armor; +11% |
| Fastest route | Complete The Sacrifice quest to obtain the mod automatically. |
The card
Tap it to unfold the full card at max rank.
16
Umbral Fiber
Umbral Fiber
+100% Armor
+11% Tau Resistance
Enhance mods in this set.
SET: WARFRAME
Where it drops
Official drop table, best chance first.
| Where | Chance | Rarity |
|---|---|---|
| Cephalon Simaris, Complete The Sacrifice | 100% | Common |
Tips that save runs
- Umbral Intensify on any Warframe
- Umbral Vitality on any Warframe
- Excalibur Umbra for matching polarity
- This mod is given at rank 5 after completing The Sacrifice.
- Umbral Fiber cannot be equipped with Steel Fiber.
Mistakes that waste runs
- Equipping Umbral Fiber and Steel Fiber simultaneously.
- Not using other Umbral mods to gain the set bonus.
- Re-Formaing mod slots to Umbra polarity without careful consideration due to Umbral Forma scarcity.
Related
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