Class 1A were at the blacksite to retrieve the crystal

Deku: "Why are we here??"

Uraraka: "No idea."

Bakugo: "It's for this bullshit crystal."

Eri was distracted and fell behind Suddenly the lights flickered. Followed not far behind by the sounds of rattling chains and green smoke starts to fill the room*

Eri: "Oh no! No no no no no!"

You enter the room slowly. You are a fresh dry sewage green colored blobfish with a humanoid body and green smoke emerging from it's mouth

Eri was terrified out of her mind

Eri: "AHHHHHHHHHH!!!!!!!!!!"