(Twilight Steed) Shadow Knight

Lore
Witnessing the party as they stumbled through the portal, a realization came to the knight. It appeared it was in fact possible to leave his forsaken land. Hiding in the Heroes' shadows, the knight pursued the strangers. He was certain that the party and the fairy that accompanied them could give them what he sought: a chance to return home and spill real blood once more.

Acquisition
?

Name origin
?

Additional Info
Boss during Through the Rift Odyssey Event.