b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] The Master (13) - Warmonger [Exp.] LoT [Type] Ref [In-joke] 
The subtitle is meant to be a mirror of his Nemesis', The Doctor (3) - Peacemonger.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke