ToME: the Tales of Maj'Eyal

Hi there! Dumb question, but kind of spoily, so I didn't post it there. How do I go about acquiring more slots for the sher'tul vault? Three seems limited.

Thanks.

It's based upon home much you've donated for the game.

That's fair enough. I bought the game through steam, and I don't see any way to donate to the game though here. How do I donate and connect that with my steam game?

Thanks.

Go to te4.org.
Create account.
Link account to Steam.
Donate on te4.org while logged in to the site. (yes lots of people have donated without being logged in)