Age Creation

Ages, in Mystcraft, are minecraft dimensions that are characterized by a type of landscape, a collection of terrain alterations (such as caves), a collection of landscape populators (such as mineshafts), a collection of biomes and how they are distributed, a list of Celestials (such as suns, moons, stars, etc. -- note the plural form), and information about the colors, speeds, frequencies, etc. of everything.

Creating an age refers to writing a description of that age, and then making it in-game.

Age descriptions can be inconsistent; specifying two different types of biomes, for example, will cause a contradiction. This will generate instability.

Age descriptions can be incomplete; missing information will be filled in by the game during initial generation of the age. In prior versions, this would cause instability; in the current version, it does not.

Age descriptions can contain "excess" -- things like extra deposits of minerals. These will cause instability. Note that even good writing cannot prevent random additions that may contain such extras; it is possible to reduce the chance of random extras, but it is not possible to eliminate them completely.