“You're not supposed to be in here! You're going to ruin the surprise!”The following section contains spoilers.
While Umbra mods can be used on any Warframe and weapon, Umbra mods have a unique Umbra polarity, whose matching polarity can currently only be found on Excalibur Umbra, the Exalted Umbra Blade, and the Skiajati and it is not possible to Polarize the Umbra polarity at this time. As such, it's advised not to polarize the pre-existing ones. When acquired through The Sacrifice Quest, the Umbral mods will already be at rank 5.
List of Umbra ModsEdit
Mods are shown without the set bonus, which increases their stats.
Umbral Mod SetEdit
The Umbral mod set can only be equipped on Warframes, and provides bonuses to their individual mods when all mods in the set are used on the same Warframe.
Sacrificial Mod SetEdit
The Sacrificial mod set is a set of Umbra mods for melee weapons, that provide bonuses to their individual mods when all mods in the set are used on the same weapon. They cannot be put on Arch-melee weapons.