“For I am a True Ancestor... The Seventh Seat of the Apostles... Reviver!”

The fight against the undead (or newly alive?) former Light Dragon King is coming to an end, but that isn’t the case for our heroes’ entire dungeon escapade. Elsewhere, the showdown against the mastermind behind this whole debacle, Reviver of the Apostles, is about to begin. What is his motivation? His backstory? His true plan? His powers or fighting style? Or indeed, is Reviver even a he?