" Sacrifice to Mountains and Rivers " was a term used in web novels. It usually appeared in fantasy novels and fantasy novels to refer to a cultivation method. Cultivators needed to infuse their spiritual energy and soul into the mountains and rivers to achieve the goal of improving their cultivation. To be specific, the refining of mountains and rivers needed to be carried out at a specific place and time. Cultivators needed to ignite the altar and inject their soul and spiritual energy into the mountains and rivers before returning to recover their bodies after a certain period of time. This kind of cultivation method was often accompanied by danger and tests. The cultivator needed to have a certain strength and willpower to succeed.