Or even more bluntly - "High level NPC's with a lot of flavor text", especially the older D&D editions. Makes sense for Eugene, he probably started adventuring under 1st Edition rules...
Side note - one of the reasons I really like the old game Runequest and its modern descendants like "King of Dragon Pass" is that it took what would be the fluff of other gaming systems' deities/religions and made it the crunch. Designer Greg Stafford (RIP) was all about incorporating the Mythic into his games.