Gulliver wrote:
[...]
Maybe be a faulty cob somewhere with a time-bomb effect... but which one and where?
Well, that is where the whole sacrificial world and trying out agents 1 by 1 idea would come into play. It's long and tedious, but may give some usable results.
Unfortunately I'm out of ideas that aren't a complete pain in the rear end, so.... I don't know.