When using the technique the shinobi will have a large quantity of chakra surge out from their body. This can be done through sheer willpower or using a technique like Pressure Points of Harm and Death. The former will keep the chakra invisible even though it is very concentrated, which is a testament to the user's control over chakra. Once released, the user uses mental commands alone to gather the chakra around a desired body part. This takes a lot of control and patience as the chakra is so concentrated that it is hard to work with. Having it gather around a body part only makes it even more difficult to work with as its concentration will increase. This means mental commands and ordinary ways of controlling chakra won't work on it any more. So instead, the user must rely on mental imag