Strictly speaking, you did word it correctly. Problem is English speakers (at least here in America) often use 'and' instead of 'when.' So, by convention, 'Stage 9 and my god Guren came along,' sounds like, 'Stage 9 WHEN my god Guren came along.'
Basically, it's quirk in our spoken English that isn't technically correct, but we do it anyway.
It's no big deal, but since you're from Greece, I assume English isn't your first language?
At any rate, in English at least, when you connect an episode title and an event from an episode with 'and,' it makes it sound like the event occured in the episode mentioned, such as with 'until Stage 9 and my god came along.'
Not trying to call you out or anything. Just the statement was somewhat ambiguous. I can see what you meant now thought, so no problem.