Mark Gruenwald

Top Marvel Comics editor Gruenwald died suddenly of a heart attack in 1996, aged 42.

Luckily, his final wish was well known long before his death: he wanted his ashes mixed with ink and made into a comic book.

In 1997, Marvel granted his request and the mixture was later used to illustrate Squadron Supreme – a reprint of a limited edition book that Gruenwald wrote in 1985.