Ouroboros Spine and i don't know how it gets better than this

NO!!! Nantahala hollered, refusing to believe the stranger, THAT CAN'T BE REAL!!!! She would prove him wrong!! I CAN DO IT!!!! I'LL SHOW YOU!! Now, she was more determined than ever to climb the tree. She shifted her focus to the tree trunk and frantically clawed at it in an attempt to grasp it, but each time she tried, she was unable to do it. She let out a frustrated groan. 

I'M GOING TO DO IT!! she assured him, unwilling to give up.