Floor 14. I missclicked into the mistake of going into railway 4. I spent an hour figuring out how to progress before crushbound+outis binds spam saved the day.
In 1 turn they both corroded and would've killed me but biovenom came in clutch and just killed the last envy pecca and skipped the turn entirely.
Sheep turn 1 scream did 1600 damage and killed everyone.