b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] The Master (16) - Devil Incarnate [Exp.] AF [Type] Rel [In-joke] 
Reference to the Master being the Devil in the subtitle is meant to play off The Doctor (8) - Amnesiac Saviour in the same set.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke