Rex didn't plan this.
He didn't plan for Lilliana's bloodline to have any relation to souls—so that she could help him in this realm. As the System had explained—the bloodline gained and bloodline evolution depended on what power already existed within the target.
Sure, he can manipulate the bloodline gained to an extent, but not that much.
Not to the point of making a pack member obtain power that he desired for them to have.
Moreover, he has never been to the Sundial Arch. He wasn't aware of what to expect in this realm.
Had he known, he wouldn't get stuck like this.
Regardless, bringing Lilliana along was conveniently the right thing to do.
She was essential to explore the Sundial Arch.
Not only did she crack the formation's core influence, but she was also sharp enough to know that things in this realm would not be so simple. For a realm of this magnitude, there was no chance that the Weaver of Time would make a trap so simple.
