b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Thalia (6) - Interdimensional Expert [Exp.] LoT [Type] Ref [In-joke] 
Although Flavia's generation is more or less random, Thalia's is exactly 1 generation behind her because Thalia was originally meant to have Flavia's role in The Five Doctors.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke