A million years

[Even if people will hate you, I think you should do whatever has to be done. You are different from me, and I want to see you able to enter a period of peace. You might be forced to fight in order to kill the last Advocate of the Pryard but I think you can do it. Just use my Power, control the races and Devils who had been loyal to me until the very end, and get rid of the Advocate

Do whatever it takes to never regret anything in your life!]

At the end of the day, Damian had many things to say. The things he had to say got even more after Nial told the Late God of Darkness that he respected him. It was almost as if Damian actually needed to hear something like this from someone. 

Having been part of Nial's life and witnessing everything the blind Original had gone through, Damian could tell that Nial's words were genuine and that he would never say something like this easily.