I Walk Through the Valley of the Shadow of Death

A.K.A. Why Do You Go Where I Cannot Follow? Based on a prompt from Tumblr user sagestormashes. After Wally's death Nightwing is overcome with guilt and self loathing. He eventually ends up at M'Gann's place at 2 am begging her to put him in a simulation where Wally's alive. "Make me forget him... Welcome to the last place you'll ever see. Welcome to Hell" Night!Flash angst.