When Fox finished her intertwined wall foundation her back was killing her. she had to write the runes in the ground slowly as to not make mistakes. On top of that she was also making sure the intertwining was almost enough to give her a head ache. almost. For now it was her back. after a few minutes of back stretching and popping she walked back to find Iggy. Activating the jutsu shiki would probably drain her but it would be self sustaining so she would get in a good nap. But for now she just needed Iggy to set the rules of the walls