If you ever are in a negative mood and know how to manipulate kna and move that negative kna into some other object, you will be able to store it and save it to be used in curses or more malevolent practices. This will allow you to call on some more negativity when you are in the process of needing it. This is a way of saving negative kna for the future so that it is not simply wasted when you feel bad and can be channeled into something to be used for later. It also helps to banish it from the individual to make them feel better by releasing their negative kna.
To do this, you will need some form of object in which you can store negative kna within, and you will need to be in a bad mood so that you have negative kna to transfer into the object. This object can be pretty much anything though it should not be made out of metal most of the time. This is because metal is not very good for placing kna upon it because of its metaphysical properties. Some other items have cleansing or transmuting properties that would not be the best to place negative kna within. Once you feel you are done, you can stop focusing and allow that kna to be within the object.
Once you have the item, place it within your hands, or place your hand upon it if it is too big, and begin to visualize your negative kna from your emotional state flowing into it. Take your time and focus on this for a long time, feeling your negative kna drain into the object and powering it with your negativity. You will want to sit in this process for quite a while, but once you feel you are done, you can stop focusing and remove your hand from the object.
Now you will want to keep this object in a place where you will not need to interact with it that much unless you are adding more negative kna to it. Good ideas of places to keep it would be within a box or wrapped up in black cloth. Both of these will keep the negative kna from interacting with the outside world and will not allow it to affect anything else in your space. Keep your object safe and other things safe from your object. Once you find a purpose for that negative kna, all you have to do is bring that object into your magickal working, allowing it to power it.