after leaving the building
pitou activated a tecnique nessesary for assasination, the ability to conceal your presence
he used zetsu to lower his presense
and one of the abilities of the metod
[heavenly killer]
although this metod is used by park seong a human in a word of murim
the metod in itself is a guide of to kill people in as many diferent forms as possible
so it does have concealement tecniques necessary to make assasinations
the tecnique in question is [ilusion cloak]
it deflects ligth making visually impossible to see with normal eyes
so
after deflacting the ligth on his face he walked home
after reaching home pitou rushed to his room to pick a mask
"their" dad tang hao asked mei
"witch spirit you awakened "
"i awakened the blue silver grass"
tang hao twiched his eyes in surprise
his aura got deaper and colder
like he is reviveing an sad memory
"just like her mother" he whispered sligthtly trembling
"but father"
"i got another martial soul"
tang hao´s eyes widened at the comment
"show me" he said albeit more serious this time
she acepted the order
and in her rigth hand apeared a semenly common black hammer
the moment she holds the hammer the hammer falls down
she apeares to have difficult caring the hammer as if it was very heavy
tang hao trembles and whispers
"clear sky hammer"