Karakawei:
I know very well where the dinosaurs live. If you leave this place with Kariachin's help and go up north, you will find a cave linked to an area of the Lost Nest.
Enter it and you will find the dinosaurs easily. Once among them, hunt Ornithomimus and Deinonychus and gather their claws and bone fragments for the ritual.
Once you have obtained more than two of each of them, return here. In the meantime, I will prepare another part of the ritual.