Well, my money's on this ending with you using your power to go into her mind.

Noah just needs to go into Chernyls dreams of unicorns and rainbows.

Noah's been thrown into the deep end, with only his imaginary magic waifu for guidance.

What do you mean, all by yourself? You're talking to Ciel, and all around you there are very friendly "people" ;)

Noah feels responsibility! He's growing up so fast :*)

Noah’s been the only one who could truly stop this from day one, and he might just now be about to realize. After all, who else could go to the true source of the nightmares?

Dream Boy vs Nightmare Army

Well it is time for your dreams to come true.

Running far enough away to escape all the nightmares seems highly unlikely. So most probable solution is to try and use tacking ability to try and find anyone else for help, because I highly doubt Noah is gonna want to even try to face Chernyl alone.

Fortunately, the nightmares go after the bigger threat first, which is not Noah. But now he's the only one around. He needs a mildly-threatening companion as a decoy.

So everything depends on Noah now ?
we're so fucked

Step one: Wish for a way to fix this
Step two: Survive the mental hellscape
Step three: Fix it

If the mind he enters dies, does he just get ejected unharmed? Cuz if so, get into someone's mind, hide, and wait for any remaining JSPs to blow the city up.

Sir... radiation

Finally, Noah, you have to decide what to do and do it.