Where did full-time hunters kiya and Xiaojie learn their unique skills?

I learned it on a greedy island. Bisji taught it. Xiaojie's trick is rock, paper, scissors. The strange tooth is electricity. Because I was often electrocuted when I was a child, I can use it now. Yo-yo is a weapon. It weighs several tons. Reading ability seems to have five departments: strengthening department, changing department, releasing department, reflecting department and special department. (It seems to be = =) Xiaojie's stone is an enhancement system. He directly concentrated on hitting people with his mind. His attack power is very strong. Scissors are a constantly changing system. Things not far away can be cut. When he is greedy, he will cut off his leaves. Cloth is a release system, which can attack distant enemies and release mind bombs from the palm of your hand ~ What is the forced growth of Xiaojie? I don't know. Later, I only read a little ant's article, and I'm not sure ~ typing is so tired = =