The two Evil Cultivators left Lu Xuan with a large amount of high-quality, diverse fertilizer, which could sufficiently nourish and cultivate a variety of Weird Spiritual Plants for a considerable length of time.
Although the many skins split from the Jade-faced True Person had no flesh nor bones, they could completely mature the sixth grade Colorful Corpse Skin, and there was even an excess.
The copious amount of flesh tentacles left by the Dwarf Cultivator could be used to nourish the Spirit of Flesh, the Fragrant Flesh Branch, the Evil Granny Tree Monster, the Ghost Tumor Demon Wood, and other Weird Spiritual Plants.
This was flesh from the body of Jindan Cultivators, rich in nutrients—it was very hard to find better fertilizer than this.
The souls of the two could also be refined into Ghost Creatures by the Linggu Transformation using the secret method in the "Ghost-Rearing Technique," which could be used to cultivate the Ghost Eating Evil Vine.