Deckard Cain is the elderly Horadrim scholar from Blizzard's Diablo series, first appearing in the original 1996 game as the wise NPC who identifies items and shares lore. His greeting, stay a while and listen, became his catchphrase across sequels and one of the most quoted lines in PC gaming. As Diablo clips and memes spread online, the line escaped the games and became shorthand for settling in for a long story, an info dump, or an old timer's tale.