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 to the lady while putting a paper out with a pen and giving it to the lady, 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..