Something I think that people frequently get wrong about Eternalism is the belief that there are fundamentally distinct "timelines" that compose reality/time. This isn't true.
Mother/Euleria explains this. Time is more like a block than it is a series of branching timelines dividing reality up. All of the sides (of which there are an incalculable number) of this block exist all at once. They are static, composing the total "shape" of time. Each side is no more or less substantial than any other. Each side represents a sequence of cause and effect.
So what are the Strands of Khra that Fibonacci brings up? Loid tells us. They are conceptual embodiments. Meaning they did not exist until someone tried to understand time, and came up with the concept of a "timeline." Thus, time and reality predates them, and thus they are not fundamental to the existence of either.
So why are the Strands of Khra important? Because they were conceptualized as being a fundamental organization of reality and time, they can be used to manipulate them. If you think there is a strand of time, that if poked and prodded, can change the course of events, than it will be so.
This is bad for us, because Wally can interact with these Strands. He's outside of time and reality. HOWEVER, Fibonacci also tells us because Wally is without his finger, he is bound to the limitations of the Strands of Khra. Meaning he can only do with the Strands of Khra what we can conceive of. This likely goes for any other Embodiment. If we Conceptually Embodied a Norg that was too heavy for Wally to pick up, then he couldn't pick it up. Presumably, if he gets his finger back, he could supersede any Embodiment we could come up with.
So we conceived of time as a bunch of strands, and they came to be, right? Well, it's interesting to think that Mother/Euleria's aforementioned block has also been Conceptually Embodied, as well. No idea what that would mean for the Strands, though.
