念能力, or "Nen," is a fictional concept from the anime and manga series Hunter x Hunter created by Yoshihiro Togashi. It refers to a form of life energy that individuals can harness and manipulate for various abilities. Each person's Nen is unique and can be categorized into six main types: Enhancement, Manipulation, Emission, Conjuration, Specialization, and Transmutation. To use Nen, individuals must first learn to control their aura, which is the life force that surrounds them. This control allows them to perform extraordinary feats, such as enhancing physical strength, creating objects, or even manipulating the environment. Mastery of Nen can lead to powerful techniques and strategies in battles, making it a central element of the series.