Senjei (Earth-2356)

Senjei are a specialized field of Force techniques that involve the use of midi-chlorians. Senjei practitioners, known as sages, learn to draw midi-chlorians inside their bodies, blending it with their own Force to create senjei Force. This Force adds a new dimension of power to the user's techniques, while also allowing for the use of techniques that would not otherwise be possible.

Overview
Senjei is known to be taught at two locations: Mount Myoboku on Ahch-To, and the Ryuchi Cave on Mortis. To use senjei, one must first learn to sense the Force in their surroundings and gather it inside their body. It must then be balanced with the user's own physical and spiritual energies, which make up their Force, to create senjei Force. If too little midi-chlorians are added to the mix, senjei cannot be used, but gathering too much results in the user turning to stone.

Source

 * https://naruto.fandom.com/wiki/Senjutsu.