This made me think of a game like fallout where a surviving llm is treated like some kind of indecipherable oracle left over from the ancients. And then as humanity recovers someone finally looks under the hood of the Oracle to discover there is no great magic
In fallout it would turn out to be a human brain kept artificially alive… or if were going with canon a hapless fellow who falls into fev and morphs with a computer…
Not too rule your addition outright in future installments.