b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Darnwalm - Exiled Mutant [Exp.] DoG [Type] Ref [In-joke] 
The name is made up from the two actors who played nameless mutants: Brian Darnley and Peter Walmsley.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke