b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Creet - The Last Boy [Exp.] 10D [Type] Ref [In-joke] 
The subtitle is a reference to another boy with blond locks, Kamandi, the Last Boy on Earth (DC Comics).
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke