Every one of the myriad of worlds and universes had its proper feature, a curse or a blessing depending on how you act on it. But this one had a very particular one. In it you, i.e. the drifter, literally can't lie. It was supposed to be a curse that would add challenge to player's progression through the Chain of worlds by preventing them from using tactics of deceit and manipulation or even telling a little fib on the course of life. But the way this feature implemented itself was like nobody would expect. Indeed, being a player in this world you actually are not able to lie, but not in a sense that somehow you are stopped from uttering, communicating or even thinking a lie by some unstoppable force, but rather that everything you say (or, indeed, think) automatically becomes true. As such it was, in a sense, not a singular timeline, but rather a bundle of slightly divergent timelines, bound to a common thread at exact points where you claim or assume something. This essentially puts you in a position of real God in biblical sense: the all-powerful creator of the universe. Your power is, indeed, absolute: there is no event you can't bring into life and nothing about this world you can't just change on a whim. Even if you are in fact faced with a question you don't know the answer to, all you have to do is say something like "I am a very smart person and as such I, or course, know the answer to this question", and everything is solved.
So, you might say, sounds like a pretty sweet deal so far. What's the catch? The catch is the so-called Lerner-Leszczynski Downscaling Paradox.* You see, as the structure of the world is eventually defined but what you claim it is, it has to be defined by what you think it is. But you are the part of the universe yourself. As such you are necessarily less complex than the universe that includes you and numerous other beings and objects more or less as complicated as you. Because by simple logic of information storage you cannot in principle think of something that has more parts than bits of information you are able to process, you can't even adequately model your own body in your mind, let alone the whole world. As such it is quite obvious that the picture of the world you have in your brain is incredibly simplified compared to the real thing. But, by the logic of this world, the universe has to adapt itself to this picture — so that you, as it were, wouldn't be "lying". So the universe would obediently "dumb down" to suit the image that is in your head. But in the same time, you are part of that universe yourself! That is to say, what you can or can't think of is defined by your biology as well as chemistry, physics and other logic of this world. As such, as the universe becomes "dumber" so do you, leading to an even more primitive picture of the universe leading to an even more primitive universe and so on, until you become something incapable of any actual thought, at which point the universe disappears. There were no chain drifters who would be able to solve or work around this paradox and ascend to the next world, whatever that may have been.

* Mark Lerner and Theodor Leszczynski discovered this paradox while researching what's called temporal black holes — the special points of multiverse where multitudes of different timelines seem to converge and disappear. Just like actual black holes in space, those appear to have some sort of an "event horizon", a point from where no timeline is able to diverge again and none of the possible uncountably many branches of a timeline can reemerge. They theorized that this point may mark the emergence of such an all-powerful actor that inevitably destroys the universe it appears in.[Lerner M., Leszczynski Th. Paradoxical downscaling and fall in complexity as a probable source of temporal black holes // III Interplanetary Conference of Temporal and Multiverse Physics. La Nova Espero, Liberlaglio, Osiris, Aprimay 2189.] Leszynski later coined the term "Liar's curse" in his popular articled [Leszczynski Th. The Liar's Curse: why being all-powerful is not necessarily a good thing. // Cosmologists United Blog and Aggregator. 12.12.2190.] This theory has not so far been proved or disproved by the scientific community, but it has had a significant cultural impact giving rise to a number of cultural adaptations. Alex Zayats used this paradox as a basis for his "Dumb Creator" theory, thus proving [Zayats (Zajac) A. The Liar's curse and the Intelligent Designer: something has to go // Review of Cosmology and Multiverse Physics. Vol. 111. Nr. 35. P. 215–217.] that our world cannot have had an intelligent creator that was itself part of the universe. So there are only two options: either the universe has an intelligent creator who is somehow extraneous to the universe itself and more complicated than it (which boils down to the well-known "Creator's Creator" paradox: if the creator of our world is not part of the world, it must be part of some more complicated meta universe, so in fact we have to talk about that meta universe and its creator) or the creator of the universe is in fact dumb and has no idea what it's doing, as such being more like random chance than an intelligent designer. Zayats argued for the latter drawing, among other things, from biological, cosmological and religious example in his fundamental work "The Dumb Creator".[Zayats A. The Dumb Creator. Suzimiah-no-Artzenstadt: Thought Gang Publishers, 2225. 550 p. Ill.] Some religious organizations, including such influential congregations as The Cult of Absolute Randomness, The Religious Irreligious Society and The Church of Chance, among a number of smaller ones, use Zayats's theory as basis of their faith and recognize "The Dumb Creator" among their sacred texts.[Xi J., Rogoff A., FitzFranklin R. "Spiritual unbelievers": non-theistic religious cults in Human Planets, their roots, their ideology, their activities // Annual Report on Religious and Spiritual Affairs. Suzimiah-no-Hauptstadt: Hauptstadtskanzellareisverlag, 2311]