Yun Feng was still very young when it came to making potions at the Zen Master Level. She couldn't guarantee that her success rate would be high. Luckily, she got support from Stonemother with a lot of herbs, especially the Secret Gold Rootless Grass, which was the foundation of the Zen Master Level potions. She took a lot of them. Yun Feng had only comprehended one of the Zen Master Level potion formulas, but she really didn't want to give the potions she comprehended to anyone else, especially the Alliance of Killers.