Gerry Conway, a renowned comic book writer who helped create characters and stories for Marvel and DC, including the Punisher character in the Spider-Man comics, has died. He was 73.

In a Monday statement announcing his death, Marvel described Conway as a legendary comic book writer with a prolific career. He died of pancreatic cancer on Sunday in Thousand Oaks, California, his wife, Laura Conway, told the Associated Press.

“From Spider-Man to the Avengers, Iron Man to Captain Marvel, Gerry Conway has deftly written almost every character in the Marvel Universe,” Marvel Comics editor-in-chief CB Cebulski said. “Gerry Conway’s legacy has made an undeniable and indelible impact on the Super Hero stories we know and love.…