[Klashikari]

for the original first serie, i do not know (didn't watch the first one), maybe someone will tell you (but as far as i can remember of some spoiler, the first serie didn't cover a lot about thousand master story)

edit : found something. try episode VIII.

this part of the story is only covered with "evangeline" arc, and shouldn't be shown later.

however, some details can be shown with episodes dedicated to negi's father.