b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Deus ex Satsuma [Exp.] Inv [Type] Ref [In-joke] 
The title is a play on Deus ex Machina, and used by fans in response to the ending of The Christmas Invasion. (A satsuma is a kind of orange.) The quote refers to this ending.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke