PhosW12

I present to you the ship of the future: (Vermon x Yulian), I am like a fortune teller.

Leave Dan Monte alone, he deserves better XD. Better alone than with bad company (Yulian), he just wants to have parents who finish raising him and fight crime with his friends

You have now been marked with the Brand of Sacrifice. The lives of those who bear the Brand, from the last drop of blood, to the last moment of your agonizing death, will feed life to the new Child of Darkness.
The lives of the sacrificed, someone close and important to the summoner (anyone in this manhwa works and more if they are powerful), are then offered to creatures of the darkness and ritualistically murdered. At least in the case of God Hand members, the deceased's life force is used to complete the summoner's transition.

see this video is the entire ritual (which YY did not want to show us):
https://www.youtube.com/watch?v=7gkuxh3SbdY&t=76s&ab_channel=IvoryIvory

parasite evan complete the first step in chapter 36, now he will summon demos for eat all (charlotte and her people because they are powerful and he need powerful people to gain powerful powers)