Get a little wet
You walk through scours of glass cages, keeping within them the beasts of yore.
Each cage has a plaque specifying the creature and it's origin.
You and Lucifer slowly pace the halls looking for one in particular....and old pet....
"Chimera....Cyclops....no no"
"If I recall, he'll be with the serpents," Lucifer remembers.
"Ahhh yes! Jormungandr.....no.....Lamia....a baby-eater after my own heart, but alas...no.....Oh wait! There he is!" you exclaim.
"Oh our sweet boy...What have they done to you?"
You stand before a glass tank filled with dark, murky water. Lurking in the shadows is something massive, something primeval.
You both look at the plaque, then at each other excitedly...
"Leviathan..."