I will be updating the older posts so that we keep the information straight, and as accurate as possible. The first part is the corrections. One way or another we will filter through the information and get it as correct as possible.
Corrections and Details
Plague Marines do have FNP and do not need Typhus for it
Typhus does give FNP to Cultists and they are fearless when upgraded to zombies.
Lucius the Eternals attack profile is based on the WS of his Opponent only in a Challenge
Daemon Forge is an optional to use ability that is only for shooting not CC. It allows to re-roll failed armour pens or to wound roll, but you have to roll a d6, and on a 1, your defilier looses a hull point.
Non-corrections
random terrain is officially called "mysterious terrain"
Cover is definitely 5+
The book is called chaos space marines.
Typhus unlocks plague marines as troops
There are no legions.
the anti psyker stuff in the book is a special rule called "suffer the witch". Every unit can negate a power on a 6 up but it can be buffed....
One is called ecstasy...which sounds weird but basically it allows the user to fire his weapon at his strength value.
Another special rule is called soul blaze
Some usr names in the codex are "strike down", "blind", and "un-weilding". these are in chaos marine entries, with rules in the main rulebook.
There is a usr called "invisibility" that seems to have an affect on targeting a the unit and also effects assault.