Battling unknown foes is not as much fun as one would think. Then again, why would one think it is fun in the first place? Unless they happen to have a superhero complex of sorts? What an odd being you are indeed Phil.
The good doctor didn't know exactly what he was fighting, as the authors couldn't decide if it was an invisible force, or a blue blob that probably had a grudge against humanity for some reason or another. All Doctor Strange knew was that it was from the Dark Dimension. Actually, He didn't even know that, that was an assumption. An assumption based on how well he knew the author currently working on this part of the story, which was not at all. Well, he did know some about this author (So dubbed Author-san, the other Author-sama, by Author-san. Author-sama can shut it… respectfully.) and he would have been right if not for the fact that Author-san liked to confuse the readers with fourth wall breaks that change the way the story goes in the middle of explanations.
Therefore, unbeknownst to him, this 6 foot and ½ inch tall, white, invisible rabbit was actually from the Bird-people Dimension. Where everyone were birds. Don't ask questions Alicia.
As he was trying to fight this weird amalgamation of whatever Author-san could come up with on the spot, he made a mistake. A mistake incredibly foolish, he barely noticed.
Until, that is, he was catapulted into a store front with the force of Minecraft Steve punching wood. What mistake you ask Marcus? He zigged instead of zagging.
As he got up from the throw, he heard an employee complain about "Those darn FNAF wannabees. This is the seventh time!"
The Cloak levitated him up, and he looked out the window. The wall he was thrown through was fixed? For some reason? Why did the windows show what was definitely not New York? If he didn't know any better, he would have thought it was Tajikistan.
It wasn't, but Author-sama (who is going with it, but hates it) told Author-san to pick a random African country and that was the one Author-san picked (Yes, 'African' country… Totally).
The good doctor, not to be confused with The Doctor, Doctor Watson, or a man named Henrik, turned to the employee and asked, "Where am I?"
The employee replied, "That depends, where did you walk in from?"
Strange looked back outside. "New York."
He turned back around when he heard a whoosh noise to see the employee looking completely different. "Yeah, sorry about that. The doors have been on the fritz."
Then he heard the noise of the beast he was fighting and spun back around to see the hole he had been thrown through. The camera panned to show the destruction of New York as Reagan pondered what exactly they were reading again. (The answer is indulgent crack about Dollar General.)
Deciding to figure out what happened another time, the Cloak flew him back out to confront the thing that had thrown him into the building in the first place.
Behind him, the wall repaired itself. It left no trace that the building was damaged at all, prepared to accept the next person the authors threw at its doors.