Zitra was very happy for obtaining the dagger. It will help her greatly at improving her law comprehension and she will not need to waste time performing experiments, wandering through the universe in search of phenomena or in dangerous fighting to understand the essence of the Law of Light and the Law of Shadows.
This is where individuals with bloodlines have a massive advantage. They can look at their bodies to understand the essence of their laws and they only look outside for inspiration or knowledge when they desire to increase the speed of their training.
Of course, they have a drawback that is their bloodline shackles. Once they reach the limit of the help their bloodline can provide them, improving their law compression will be dozens or even hundreds of times harder than people without a bloodline. That is why is very weird to find someone with a King bloodline who has reached Rank 6.