Tibithia Σ
Plantera
(I have no idea what the happened with Flask.)
(He became Sulphuric dragon the previous day, and since the lungs aren't used yet to creating the breathable gas, Flask seems sick. Don't worry, he won't die to that, for I think it's impractical to stove him away in the facility just to have him breathe that kind of gas. And if they will adapt, he'll be able to do so himself.)(I have no idea what the happened with Flask.)
(Let's just say that Flask can still breathe the oxygen for now in spite of being sulphuric dragon, and that I'm not locking him away from plot because of technicalities.)(I did not understand half of that.)