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 Sunday at his home in Thousand Oaks, California, The New York Times reported. His wife told the news outlet the cause was pancreatic cancer.

“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 C.B. Cebulski said. “Gerry Conway’s legacy has made an undeniable and indelible impact on the Super Hero stories we know and love.…