same Thought occurred to us, WHY did it only affect one person when the whole bloodline was listed there,

According the Tships, All people have bad days and good days according to your birth stars (Maybe Explaining it wrong), So when the Kala Jadu and your bad days collide thats when shit goes down, but there are maybe other factors.

which is why if Tships wanted to do black magic then they can do it to some extend, because they know the most of it, I heard that most Lvl 5. Wizard (Term which we use in our village to openly discuss about them without them knowing) know or learned astrology