Everyone dies. But delaying that impending sentence is the holy grail. Science, scorcery, and wishful thinking do all in their power to bestow such delays. Be your deeds pure or evil, cheating death is neither easy nor reliable.
Wanderers beware, these gates open not,
Except to those only who the way have bought.
You may purchase the right to pass me by,
By each guessing my riddles. Care to try?
The PCs encounter an elaborate trap room, designed to fill with water, drowning those inside. Clever and resourceful, they disable the trap and move on.
Only later do they discover that this room is part of the elaborate cooling system that prevents beasts of elemental fire from overrunning the complex. While the fiery beasts run rampant, they begin setting fires, which causes the complex to become increasingly hot and smoke-filled. Additionally, the PCs now have to fight their way out past aggressive fire creatures...