As I live and compile
Early on in the film, Chiwetel Ejiofor’s Mordo is seen wielding the Staff of the Living Tribunal during Doctor Strange’s training phase. While this artifact itself doesn’t exist in the Marvel comic books, the name of the staff will sound familiar to fanatics.
The Living Tribunal is one of Marvel’s most powerful beings, since he’s the embodiment of the entire Multiverse. That’s right, The Living Tribunal is a sentient, humanoid collection of universes. If that doesn’t blow your mind, we don’t know what will.
Since The Living Tribunal solely interferes when the balance of the universe is threatened, it’s unlikely we’ll ever see him on-screen in his full glory. However, since Earth was about to get sucked up into the Dark Dimension throughout the course of this film, having a slight nod towards the entity seems only fitting.