[VXA] Script or Event? Skill-obtaining system help.

I'm currently working on a game, (it's very much a WIP, still storyboarding, so super early on) and I had an idea for obtaining skills after leveling up, but I have no idea how to approach it.

Basically, it goes like this:
Every character has a "soul room" where they meditate to learn skills. Something kind of like in Final Fantasy XII with the license board, or like a mini dungeon. Pretty much just a map for each character (Maximum, only about 5 characters)
Easy events where you can just go up to an event object, click it, and earn the skill.

The tricky part:
As they level up, they have access to more of the room. Like, only a few are visible and accessible at first, but then say you get to level 5 and the visible area expands, allowing you to access more skills.

Is there a script or trick to expand the map after a switch or trigger? How would I go about this? I just have no idea where to start.

You could line the outside with barrier events that only let you pass after level 5. Then you could show a picture over the top to create a shadowed area.

You could line the outside with barrier events that only let you pass after level 5. Then you could show a picture over the top to create a shadowed area.

I didn't even think about a picture, jeez.

How would I go about accessing this area, though? I want there to be some kind of mediating animation after accessing it from the menu. Some kind of common event?

A common event would work. I made a camping event system that teleported you to a variable-based map. It might help.
http://rmrk.net/index.php?topic=43560.0

Oh my gosh, so helpful, thank you!
I'll try and figure it out from here. If I have more questions, I'll update.