Xaedan is awarded to Tyrant players for completing Nexus Heavy Hitters. Since version 1.7.54, selling of this card is disallowed.
Xaedan is also encountered as a Mission Commander.
Xaedan can be upgraded using one copy of the card and 20000 Gold. Doing so raises its Heal Xeno ability to 2, eliminates the 'Bloodthirsty' limitation to its Weaken ability, and raises its Health to 16.