b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Romana (1) - Ringer for the Princess [Exp.] AW [Type] Ref [In-joke] 
The subtitle also looks ahead to Princess Astra who looks just like the second Romana (both are played by Lala Ward).
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke