Excalibur Prime

Excalibur Prime is a limited edition Founder's class. Its abilities are identical to Excalibur's and it is the only class so far which comes with an unlocked upgrade tree. ''Please note that concerning mastery, Excalibur and it's Prime version are considered seperate for unlocking mastery levels. That is to say, each has it's own 6000 mastery point contribution for reaching level 30.''

Acquisition
The Excalibur Prime Warframe is only obtainable through upgrading your account to Founder status of Hunter or greater.