Vike91 wrote:
What's next training after Blue Gate training? And where is it?
I think nobody answered right away because this is the wrong question to ask about a MetDROiD hold. The short answer is: keep playing, you'll find out what the next training is when you get there, and you'll get there when you get there.
While there are many individual puzzle rooms in MetDROiD Echoes, the whole hold is one big puzzle in itself. It's sort of like a huge maze. You have to figure out how to reach every part of the hold as the story unfolds. I love this kind of puzzle, but not everyone does. If you just want to kill monsters, but don't like getting lost, you might not like this hold.
The staircase training gave you a very important tip for playing this hold. Every time you return from a secret room or from a training, you are shown 2-4 rooms where you have been before. You should write these down, go back to each room, and thoroughly explore the new territory that has become accessible. That is how you progress in this hold.
Have fun!