Well here is a kind of loose script for if a cutscene can be made:
*note: this cinimatic (cutscene) is assuming that The core will require you have 4 party members
*note: everything inside a [] is an event or action not dialog
*note: this is also assuming implementing voice actors is possible
[The four knights walk in, a thick layer of mist energy can be seen throughout the area]
[As they walk in subtle music starts playing]
[As they walk, solid shoe on stone sounds are made, but are slightly muffled by the mist]
Spiral officer (radio): Knights! You made it to the core can you hear me?
You: loud and clear officer
Spiral officer good, make sure you have your helmets on tight, the only reason you can breathe down here is because the mist is being converted into oxygen.
[shortly afterword the knights begin to groan in pain, the view switches to the officers screen, A number labeled "mist percentage" jumps to 250%]
[as the knights groan louder the percentage continues to rise at 100% per second]
[The music slowly becomes dramatic]
Spiral officer (person): Lieutenant! There mist energy ratings are at 400% at rising!
Lieutenant: Knights can you hear me? If you can leave that place immideatly!
[The groans get louder as the knights attempt to form words]
Spiral officer (person): sir the knights are unable to move, and there suits are beggining to emmit mist energy!
[The rate at which the numbers increase slows down it is currently at 850% now only moving at 50% per second]
Spiral officer: They are at 900%, 950%, 1000%!
[The view switches back to the knights, who are curled on the floor in what appears to be pain]
[The music becomes grand and louder (in lack of a better word it becomes epic)]
[The knights then suddenly rise up, and an explosion of mist energy emmits from there bodies, and all monsters in the visible area are killed in the process]
[The knights are now standing proudly with mist emmiting from and surrounding their bodies]
[The view switches back to the spiral officer who's moniter now shows mist ratings going back to 100% occosionally flickering to 101%]
Spiral officer: they are alive! All ratings are better than before too!
Lieutenant: what do you mean better than before?
Spiral Officer: they seem to be stronger from the mist.
Lieutenant: Interesting, we could use this.
Spiral Officer: the air arround them seems to be powering there suit but there is something odd about it
[view switches back to knights]
[they killed a glowing spiky gel, whic launched spikes appon death, cutting one of the knights, but instead of blood coming out mist does]
[View switches back to Spiral officer]
[on the moniter you can see that the mist ratings of the knight that got cut was reduced to 85% but was slowly going up]
Spiral officer: wait a minute...
[view switches to knights]
Spiral officer (radio): Knights! Try not to get hurt, while you are in the core it seems that your health is replaced by mist, but it does slowly regenerate be careful!
Knights: Roger!
[cinimatic slowly fades out]

Thank you for taking the time to read my post

P.S. I am going to try to actually make this, but first is first, learning how to animate