Perfect Effects:
Some other cultivation styles, including Continental Knights, believe in and use Perfect effects. Those which supposedly cannot be beaten…Anglo-Saxons don't believe in that sort of thing and their Hama works to make it not true. Thanes and Insular Knights inherently treat any Perfect effect as a normal defence or attack…all can be beaten with sufficient skill. The Norse commonly also seem to have some way around such effects (and it may work even better), and so while an Insular Knight could theoretically learn 'Perfect' effects from Continental Knights, such effects are more expensive due to their 'perfection' so they usually don't bother.