One of the major changes in the third edition of Bulletproof Blues is that all powers cost 1 character point, but some powers have prerequisites (you have to buy power #1 before you may buy power #2). Our hope is that this is easier and simpler, but just in case, we have small charts to help illustrate which powers are prerequisites for which other powers. Attached below is the single most complicated example: there are no other charts this complicated. If you understand this one, the rest will be easy.
This is a much more typical example.