Spoilers

• Warning minor spoilers included in this guide.
• Proceed at own risk.

Requirements

• The war within finished.
• Mot finished in the void.
• The chains of hallow finished.
• The post chains of hallow mission in the personal quarters with the orb.

Mastery 9 is recommended before trying this.

The sacrifice

When you’ve completed the essential missions over the sacrifice will start in your codex and make it possible for you to start the search for Excalibur Umbra.

“But you won’t have to imagine. A lovingly cultured Infestation swarms within your blood. Your transformation has begun, reshaping you to a sacred lieu of the unholy Tenno… A Warframe with but a Single. Burning. Memory. It’s… a miracle! However, all miracles require sacrifice.”

Finding the data stream
Hidden in a lab, this will lead you through the quest as you piece it together slowly.

Scanning Excalibur Umbra parts
Total of 4 items to scan, the blade and the early parts of Excalibur Umbra from the floor.

Can be a real pain at the ♥♥♥.

Installing Excalibur Umbra
Excalibur Umbra will be set up on your ship and cause damage to Ordis and strangle the operator. You will use transference and watch inside Excalibur Umbras mind to obtain the emblem for the next part. Excalibur Umbra will flee your ship.

Deplete shields
Track Excalibur Umbra down and deplete his shields.

Then you can use transference and keep finding the symbols.

Morphing with Excalibur Umbra
You’ll go with no warframe and assault Excalibur Umbra with void attacks before you merg together with him and use the framework to escape.

Final show down
Excalibur Umbra is going to be amazed in place and the operator will push the sword to the man who changed him into Excalibur Umbra. The lotus will look all awakened and sentinel like.

The sacrifice is done.

Excalibur Umbra

Excalibur Umbra includes Umbra mods for the his sword and his frame.

He’s Umbra polarity by default.

Same goes as Excalibur but improved stats over the base un-primed version.

Could switch his helmet to the cracked one which can show his inner person that he was earlier being altered.

He comes pre-maxed for its use in the last mission.