The Twilight Sparkle gave Alexander a wave with her hoof before going back to what she was doing.

So, I take it Dream-Twilight is actually a pony? As in not-an-anthro-pony? :3

“What is this Equestria even going to be like? Oh god, I’m going to have people trying to kill me, aren’t I. Summoned and forced to overthrow a benevolent ruler. Unless this is one of those really bad versions of Equestria where everyone is screwed.”

That's a question.

Alexanders breathing speed up as she worried about everything that could happen, as well as the fact that she was pulled to another world against her will with everything she ever knew left behind.

Finally, some actual panic. Took long enough.

Her cheeks felt damp, Alexander dried them with her hands. She felt better after that as if she had been crying for a while. “Can I deal with things like grief in my dreams as if I’m awake?” It occurred to Alexander that for the first time since she had transformed she had found herself in the dream realm upon falling asleep. “I wonder what changed.”

Even Nightmares can cry. Apparently only in the dream realm, but still.

Alexander debated taking the candle with her or leaving it there. Eventually, she decided on leaving it since it should be day by now, and she was able to see fine enough in the dark.

I... was all of this only for the color thing? Why light the candle in the first place if you're going to leave it? At least tell me Alex put out the flame (it's just asking for trouble, otherwise).

Walking over to the door Alexander stopped in front of it, starring at the wooden double doors. “Beyond those doors are the rest on Equestria, and my first day on this world.” It was tempting to just go back to bed. Her dreams had been much more pleasant, but going back to them was not going to solve her problems.

It's not going to solve them, sure... but delay them, they would. I would definitely procrastinate in that case. XD

Alexander just ended up staring at him awkwardly for a few moments. The stallion then bowed before standing back at attention. “Is there anything you need Mistress?” he asked neutrally and professionally.

You need to remember to put a comma before addressing someone: “Is there anything you need, Mistress?”

“Ah, Mistress! So glad to see you are awake. If you don’t mind my forwardness please come sit,” Called out a unicorn sitting near the head of the table. Alexander recognised her as Rime Rose, who she still assumed was the cult’s leader. “I hope you slept well?”

I'm still not trusting her. Definitely not with what she did to the village. That doesn't really scream 'I have the best interests for you in mind'. Besides, she seems kind of... presumptuous, too.

Though would that mean Celestia and Luna are around as children now?

...

...

...surrogate mother detected.

Alexander looked down at the meal in front of her. “That felt a bit fast.” There were slices of buttered bread and cooked potato with some sort of gravy. A few carrots were also present, but more importantly, was the cooked stake.

I'm sure you did not mean stake.

He looked to be asleep, and Alexander would have assumed he was if it was not for the faint rotting smell she could now pick up and the glossy complexion his fur had. “If I remember correctly corps release oils early on when they start decaying.”

“w-what h-happened to him?”

(I think you can see why i posted this and the next chapter at the same time)

I'm most definitely not complaining. Thanks for the two chapters, I was wondering whether or not you actually meant to release two at once.

Dun. Dun. DUUUUUUNNNN!!!
The horrified realization. Does this make her a cannibal? Unwitting and forcefed, but still... I predict there shall be vomit, and there shall be rage. The rage will probably fit what they were expecting, but not targeting who they thought it would. Be careful what you wish for...

They could have at least buried the body!