Quote Originally Posted by Monk View Post
You've already told the game that 1 it's congenital and 2 the only way to get it is from birth. Leaving 'inheritance chance' in is redundant for what you want to accomplish, i believe.
Inheritance_chance is the 1.07 replacement for the random congenital tag. The guys who get the trait randomly must be the guys who also get generated randomly. Maybe add a potential:

Code:
bloodline00 = {
   inherit_chance = 100

   potential = {
      OR = {
         father = {
            trait = bloodline00
         }
         mother = {
            trait = bloodline00
         }
      }
   }

   health = 1
   fertility = 0.5
   vassal_opinion = 10
}
Of course, you could always hand it out through an event. Events are one of the best ways of handing out traits.