Shinigamis are in Death Note, I highly doubt they are real, but I could be wrong. Also, why would you want to summon a god of death/grim reaper? Like most gods and goddesses you can't summon them willy nilly for your own extent without offering them something in return. I did some research on shinigami, they reap humans to extend their own lives, in other words, I would advice you not to summon one. Especially if you have nothing to offer.
Re: No Subject
By: NimirRaj / Beginner Mar 20, 2017
Post # 4
The concept of Shinigami do exist outside of anime, though my knowledge is limited, and yet as stated summoning one assuming they exist is not something to be done lightly. I will assume an anime like Death Note is where you got this desire from though which is worrisome. Shinigami will not grant you the power to kill or death related abilities nor should you seek such things out. A grim reaper would have little time or patience for humans i suspect regardless. Death is a force of nature and while sometimes terrifying it makes life worth living.