The powers of karma, serve to protect, enhance its attributes or to cause extra damage. Each time you use a power of karma that lasts 24 hours.
You can gain powers of karma, doing work (when longer, karma earned) and missions (when they are better, more karma wins).

Winning powers of karma?
Do missions of black knights

Winning powers of good karma?
Do missions of white knights

It is possible to move from black knight for white knight, or vice versa?
Yes you can, just spend your karma initial and start doing missions knight who want to pass.