Shichō Ketsujō Zan

Southern Cross Holy Fist : Blood Blade of The Bird Of Death : A attack that starts as a two-fingered finger strike and is then turned into a slashing technique capable of slicing things so skillfully that the victim doesn't even notice. Visit this link to see explanation given by character. http://mangadoom.co/Fist-of-the-Blue-Sky/125/3/