TheCodex™ calls an arbiter or gamemaster in an instance of the game of Greater Fantasia "a devil". "The Satans" are such Meta-Fantastecha™ns acting as devils in TheGame™ of Fantastecha™. They claim they are not really malevolent, just playfully cruel on occasion.
Even underage children have been imagining and creating realities.
[to satanify][to satanify] The Hebrew verb "לשטן" ("lesaten", "to satanify") in the Biblical story of Balaam likely meant "to have the gamemasters provide a challenge".