Blood Magick: Death of a salesman
I love that movie hahaa. This blood magick takes me one month to complete, it requires a picture of you, so think about this before you do it, every night for one month it requires some magick infusion and will increase all magick, not just blood magic by 150% every three months. It is not designed to tamper with other magick, just look at it, and increase the affects every three months.
However, this will stop increasing when it can't increase without destroying, it has a built in intellgence that will tell it when you can't take anymore. when your system is about to overload. then it will just maintain. This will even work on past spells you did not think worked.