Excalibur/Umbra

Excalibur Umbra is the Umbra variant of Excalibur, first released in the Chinese build of WARFRAME. It was released in the Global build in, and can be acquired through The Sacrifice quest.

Acquisition
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.

When completed, Excalibur Umbra will already be maxed out at level 30, pre-installed with a free Orokin Reactor and Warframe slot.

Trivia

 * Umbra is the Latin word for "shadow".
 * Excalibur Umbra is the first Umbra variant of a warframe to be released in WARFRAME.
 * In the Chinese Build, Excalibur Umbra originated as part of their Founder's pack exclusive, named as Excalibur Umbra Prime. The pack also included the Nikana Prime and the Spira Prime (both of which were introduced in the Global Build with Saryn Prime instead), as well as the Gauvan Prime Sekhara, a shoulder accessory obtainable only through that Founder pack.
 * Excalibur Umbra has several differences from the regular Excalibur:
 * Umbra uses a different sword design for its Exalted Blade.
 * Radial Blind is replaced by Radial Howl, which functions the same as Radial Blind, though with the addition of removing resistances from Sentients at the cost of a slightly longer time-to-proc of the blind effect.
 * Despite not being considered a Prime Warframe, Excalibur Umbra also possesses their special passive ability where contact with an Orokin Void Death Orb will make him release an energy pulse that grants 250 Energy to all nearby allies.
 * This gives him a total of three passive abilities: The one-handed blade damage/speed bonus of Excalibur, the transference sentience of Umbra and the Death Orb energy leech of a Prime.