Randart generation

[lilywhite]

can someone explain how random artefacts are generated?

do they use the regular pool of egos? they don't seem to but I could be wrong.

do they generate as a specific archetype i.e. physical damage str/con boosting 2h weapon as opposed to an antimagic or psionic bonus 2h weapon or just draw from the same pool of egos at random and simply boost them in some way?

[grayswandir]

They get a few egos, and a few randart only powers which are roughly organized by 'theme', such as physical, arcane, acid, etc.