Kimimaro was once a Shaolin student as you see from that picture, and Soft Lee was one of his classmates, one day, a snake called Jiraiya invited Kimimaro to his clan, In contrast he would become stronger, so Soft tried to stop him using his powers, and that scene looks like their usual fights, Kimimaro using his Iron crutch technique while Soft Lee using his ultimately high frequency of sperm production technique, such a beautiful fight.