Even though Elena had opened both of the books at the same time, that did not mean she was going to learn about both of these new abilities of hers at the same time. That would be too much as her mind was still busy taking care of the vast amount of knowledge and information that she was still continuously getting.
And the first ability that Elena chose was actually Genesis, which was written in the black book.
Her reason for choosing it first was simple. Elena always had a great affinity for anything related to the concept of creation. And as Genesis was something related to it, she should have an easier time learning it.
Genesis was a very complex ability and while using it, she needed to keep a lot of things in her mind. But all of that was completely worth it because the effects provided by this skill was actually very impressive.
