you had Niki's tattoo that is his power on his wrist, he can't make a deal with someone without his powers so he have to hold your wrist when he need to make a deal with someone..

while he is holding your wrist, and made a deal with a lady in the hospital.. "make a wish" you we're shocked when he asked that lady to make a wish. "I wish or my daughter to survive" you felt bad for that lady but you we're shocked when Niki said this..

"you have to sign this before I do that but the consequence are your going to suffer with the same cancer as your daughter have right now after 10 years.." Niki said while putting a paper out with a pen, you looked at Niki shocked and frustrated at the same time when you remember your parent's death.. you pushed his hand away your wrist and walked out..