Gygax on his original killer 20-sided die

Gygax on his original killer 20-sided die:
"As it happens I have quite a number of the old low-impact dice around here somewhere. The points on the d4 were very sharp but wore down quickly. Rob had a d20 that would stand on a worn point about one roll in 50 ;)

Somewhere I lost my d20 with half the faces colored gray. It was my "killer die" that rolled an inordinate number of 20s, and the players really hated it ;)

Cheers,
Gary"

Source: EnWorld Q&A, Part 5
http://www.greyhawkonline.com/grodog/temp/egg/part_05.txt

In the comments to today's blog post, T.Foster comments:
"When I played with EGG in 1988 he was still using one of these dice - a white d20 with one set of faces marked in gray. He claimed he'd been using that die to kill PCs since 1972 :)"

http://zenopusarchives.blogspot.com/2017/04/marked-20-sided-die.html
http://www.greyhawkonline.com/grodog/temp/egg/part_05.txt

Update: Found a few more quotes about Gary's Killer Die, so I turned into a blog post.

http://zenopusarchives.blogspot.com/2017/04/gygaxs-killer-die.html?m=1