This question has probably been asked many times but regarding mystcraft in FTB Infinity, where do I start. I plan on making an age where I can set up all of my magic stuff but I've never used mystcraft and need advice. I traded with a villager to get a few pages and a notebook with some pages. I've heard before that you can make a random age and search for libraries. Is that true? If so, how do I make one of these random ages? Thanks and sorry for all of the questions in this post
Making a random age is simple- just toss a link panel and a piece of leather into a book binder, and pull out a (nearly empty) descriptive book. Mystcraft will choose all the features at random, and if it chooses some features that are incompatible with each other (or something like Dense Ores, oceans of UU-matter, diamond ore tendrils, etc.), you'll get instability. Usually, you'll get some negative potion effects; if it's bad enough, you might get spontaneous explosions, meteors, decay, or something similarly unhealthy.
However, if you do get a reasonably stable age (or at least one stable enough that the potion effects aren't unbearable), you can look around in it for Mystcraft's libraries- cobblestone structures that show up here and there filled with a bunch of bookshelves and a few lecterns with pages on them. When you find one, dig out the bookshelves even if you're not hurting for books- there's a chest hidden inside with more pages.
Once you get some pages, you can start specifying more things in your ages, which means you have more control over what shows up and you'll also get less instability. Unless you use diamond ore pages or something, of course.
Also note that notebooks can store an unlimited amount of pages. Very handy when exploring.
There's a lot of info on the
Mystcraft Wiki. There's also some YouTube spotlights and things floating around, but I'm not sure how up-to-date they are.
Alternatively, if you're not keen on the instability and such, but you have lots of RF to spare, you can use RFTools instead of Mystcraft. While Mystcraft balances dimensions filled with gold and diamonds with instability and making the dimension a really unpleasant place to hang out, RFTools balances it by increasing the RF cost to keep the dimension open. It ups the cost for each dimlet you use in the creation of the dimension (with things like diamond blocks requiring a great deal more RF than, say, cobblestone) and also for each randomly-selected feature. However, random features only cost 10% of what normal features do, so there's an incentive to just make a lot of random dimensions and see what you get.
Also note that removing features from a Mystcraft age is quite difficult (i.e. the Void World page is one of the rarest that there is; to not get random things floating in your void worlds, you need to specify caves, ravines, and some other things that you don't care about), while the Terrain: Void, Feature: None, Material: None (which is actually whatever the default material is, usually stone), etc. dimlets in RFTools are fairly simple to craft. And they don't need a lot of power, either.
You can read more about it
here.