You can find Son of Stones in Chapter 6. From the Verdant Path cliff that leads to the open area, fly up and head slightly to the left. You'll see a rock-shaped monster chilling on the cliff of a ...

If you want to heal and buff Son Wukong, you'll need to find Formulas and Tattered Pages. Here are the locations for them in Black Myth: Wukong. There are numerous ways to get these Spells.