Excalibur/Umbra Prime

Excalibur Umbra Prime is the Founder exclusive Warframe for the Chinese build and serves as a stand-in for Excalibur Prime, which in turn was only available in the Global build.

Acquisition
Excalibur Umbra Prime is purchasable for players of WARFRAME (China) on the following link.

Trivia

 * Excalibur Umbra Prime was released together with Spira Prime and Nikana Prime, as well as the exclusive Gauvan Prime Sekhara.
 * Both Prime weapons were later released in the global build along with Saryn Prime.