with Google translator

today with the Psyker the perk no mercy unlocked and found that this is only for the crusader.

why is it not displayed as for the other benefits for different class of unlocked. 

why is not such a complex perk for all classes if you can not unlock it for all classes.(3 times the week 800 fame and 5 times)

Had I known that before, I would have saved the trouble.

perk effect:

Concentration does not recharge with time.

if at least 5% of the max. LP will be dealt damage by a single hit, 30% concentration will be recharged.