I'm a bit curious as to any references official or otherwise that might exist about events after the adventure Squaring the Circle.
I'm mostly interested on the huge ramifications this would have that seem not have been addressed at all. While it would be consistent with the role that Planescape gave Yugoloths; which itself isn't too incompatible with later material depicting fiends; it does stretch credibility that something as huge as teleportation by fiendish societies used to it ( thought the use of the word is rather liberal with the Tanar'ri ) would be incredibly affected by it.
An while Yugoloths are masters of manipulation and double-dealing they can't react to what they don't know. Which means that if proper discretion is used with regards to important projects it is almost impossible for Yugoloths to place themselves as "necessary" for anything. Which means that the "friendly" Yugoloth who'll drive barmy with with the concept of "To trust or not to trust" either knew ahead of time what you were up to and what would make you listen to it or simply created the circumstances that would force you to turn to it, which in itself isn't too different from any evil opportunist in the planes ( Or at least the smarter ones ).
The problem with believeability I have is that any Tanar'ri above the caste of Goristro or any Baatezu above the rank of Barbazu have enough presence of mind to deduce what's said in the above paragraph. Wouldn't heavy hitters like the Abyssal Lords and the Lords of the Nine, as well as the smattering of Fiend nobles beneath each group start intervening directly in planar and eventually Yugoloth affairs after being personally stripped of an of their arguably most powerful ability ?
I can't remember, but I think was implied that the 'loths come see through other fiends - or at least observe them without their knowledge.
There is also the fact of the baernoloths. Having created, directly or not, all the fiends they maintain some measure of power of their races. I can't remember if it is canon but I remember reading that some baern Demented have tanar'ri AND baatezu working for them.
So, yeah, beings other than fiends can plan around yugoloths - they don't control Heaven and the Neutral Planes but have a huge stake in the Lower ones.
Bit of an aside -> I like the 'loth creation myth, but like all creation stories it radically shifts the game in my head - I also liked the Rajaat stuff in Dark Sun but was ultimately disappointed with the knowledge that he was responsible for inventing magic AND the race wars AND the Sun Magic AND other stuff I can't remember.
Finally, for perhaps the greatest ever work on yugoloths I point you to Shemeska's Story Hour (who I just congratulated on writing Paizo's Book of the Damned III):
http://www.enworld.org/forum/story-hour/77613-shemeskas-planescape-story...
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