“You're not supposed to be in here! You're going to ruin the surprise!”The following section contains spoilers.
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The blueprint for Excalibur Umbra is given to players upon completing the first mission of The Sacrifice quest, and the ability to build the Warframe is granted on completing the second mission. Unlike other Warframes, Umbra requires no further components and is constructed entirely from the single blueprint. However, even after being crafted, Umbra cannot be used until the penultimate mission. A second blueprint will not be given on replays.
At the end of the quest, players will receive Excalibur Umbra at rank-30 with a free, pre-installed Orokin Reactor, and Warframe slot.
“You're not supposed to be in here! You're going to ruin the surprise!”The following section contains spoilers. Please complete The Sacrifice quest before proceeding.
Excalibur Umbra was originally an Orokin Dax soldier who was punished by Ballas for attempting to interfere with his betrayal. The soldier was deliberately exposed to the Infestation to become an anti-Sentient weapon, a "miracle" that requires "sacrifice", and was fitted with a unique Transference Bolt that forced him to obey Ballas's whims. He was then psychologically tortured into rote obedience by forcing him to kill his son, Isaah.
As a result of Umbra's torment, he retains most of his sentience and is capable of acting on his own without the Tenno's control, even initially rejecting the Operator's Transference and going rogue. Umbra also carries the memories of his final moments before transforming into a Warframe, which the Operator discovers to contain codes that unlock Ballas's Vitruvian recordings of the Sentient's betrayal, the creation of Warframes, and the Tenno.
Umbra is first seen in a courtyard on Earth battling his creator and his allied Sentients, but due to Transference influence he is unable to disobey Ballas, allowing him to be destroyed by Natah. The Operator discovers Umbra's remains on Earth, which leads them to a containment cell on Lua housing Ballas's Vitruvian, allowing the Operator to rebuild Umbra. However, Umbra immediately goes rogue and flees across the solar system, but not before the Operator taps into their memories.
After seeing all of Umbra's memories, the Operator reassures Umbra that they will fight Ballas together. Upon seeing this act of compassion, Umbra calms down and finally accepts the Operator's Transference. Together they battle Ballas on Earth, whose attempts to subdue Umbra prove futile when the Operator's Transference overpowers Ballas's control, allowing Umbra to wound his creator.
- Excalibur Umbra, compared to Excalibur:
- Excalibur Umbra, compared to Excalibur Prime/Umbra Prime:
- Umbra, along with the Skiajati, will be obtained by the player already fully ranked. All the Mastery Rank points that would normally be granted from ranking up Warframe and weapon will be automatically received upon acquiring them.
- Due to their unique nature both are also unable to be sold from the inventory.
- Excalibur Umbra comes with three mod slots polarized with the unique Umbra polarity. His Skiajati Nikana and Exalted Umbra Blade each have two polarity slots.
- Note that it's not possible to (re-)add an polarity to a mod slot, so it's advised not to overwrite a pre-existing one.
- In place of Radial Blind, Umbra has Radial Howl.
- Umbra is the Latin word for "shadow".
- Excalibur Umbra is the first Umbra variant of a Warframe to be released in WARFRAME.
- Excalibur Umbra is the only quest Warframe that cannot be purchased from the Market or be sold.
- Excalibur Umbra's agile and noble animations are the only animations that are able to be used on other Warframes without prior purchase.
- According to its Codex entry, the Skiajati, Umbra's signature weapon, is a Nikana "grafted" from Umbra's flesh.
- In the Chinese build, Excalibur Umbra originated as part of their Founder's pack exclusive, as Excalibur Umbra Prime, gameplay-wise identical to Excalibur Prime. The pack also included the Nikana Prime and the Spira Prime, as well as the Gauvan Prime Sekhara, a shoulder accessory obtainable only through that Founder pack.
- Upon release, Excalibur Umbra had the passive ability of Prime Warframes to gain energy from Orokin Void Death Orbs, as an erroneous leftover from his data origins as Excalibur Umbra Prime. This was later removed in Hotfix 23.0.3.
- Umbra utilizes a different sword design for his Exalted Blade, which is named Exalted Umbra Blade. The stats for both weapons, however, are identical.
- Upon completion of The Sacrifice quest, players will receive an Excalibur Umbra-exclusive Excalibur Umbra Sunder Helmet in their inbox, which is a battle-damaged version of the regular Umbra helmet.
- Excalibur Umbra is the first Warframe confirmed to originally be a "human being". He is also the first frame to have had his face exposed due to damage to his helmet.
- When interacting with Baro Ki'Teer, Baro will treat Umbra as he would be any other non-Prime frame.
- Umbra's scarf and torso lining, along with his Orokin ornaments, remain visible when other Excalibur skins are equipped, similar to the Prime details of Prime Warframes when using TennoGen skins.
- Looking closely, Shadow Stalker uses a unique variant of Excalibur Umbra's body, which lacks the Orokin ornaments and Umbra's signature scarf, along with a different loincloth design.
- In the "The Sacrifice" teaser of TennoCon 2017, Umbra wielded a regular Nikana on the Orokin Moon tileset.
- It was revealed at TennoCon 2018's Sound Panel that Excalibur Umbra's howls were voiced by [DE]Steve Sinclair, Game Director of Warframe.