08:47:11 AM Sep 23rd 2010
No one ever talks about the sphere grid. Ever. In the entire game no one says shit about it. It's like a secret. You get one tutorial where Rikku shows Tidus something mystical and it's a big lipped alligator moment. Seriously what is the sphere grid. It can't be materia unless people somehow have that many slots.
09:18:49 AM Sep 23rd 2010
It's how you get new skills and abilities. That's it. Some games make the skill system a huge part of the story; this one doesn't. It's just there to facilitate the characters' growth.