So the new Black Crusade game introduces some mechanics that make Corruption Points useful, allowing clever uses of Infamy that act sorta like Fate Points etc. (I dunno, I haven't read the book, just seen the threads on the forum).
It got me thinking: I'd like to introduce some benefits of Corruption Points. Make it boost a psykers powers somehow (with nasty side effects, of course). Why? As a lure, a temptation to turn further to the dark path of Chaos. To scare the psyker, let him realize that the Dark Ones have their eye(s) on him.
To make it a harder choice to stay pure.
Just because
So what would be appropriate benefits (and side effects) of a high Corruption score?
Suggestions (drafts, for discussion):
Let the 10's digit of your Corruption Points be your Corruption Bonus (BC).
Add your CB to your Manifestation roll, just as you add WPB. However, you add +10 to all rolls on the Phenomena (and Perils?) tables when you manifest a phenomena.
Also for non-psykers:
Add your CB to your TB when subtracting from Damage caused by Psychic powers or other forms of Warp-damage. (Ie, you are more resistant to these forms of damage, as your connection to the Warp defends you). However, you also take penalties on tests to resist further corruption. (or something)
. I will see if/how I can integrate this into my "ideas-in-progress" and will reply a little later.