Which excerpt from The Cask of Amontillado best infers what will be Fortunato's downfall?

The excerpt "A huge human foot d'or, in a field azure; the foot crushes a serpent rampant whose fangs are imbedded in the heel." best infers Fortunato's downfall as it symbolizes his arrogance being crushed by the narrator's revenge. The imagery of the foot crushing the serpent represents the narrator overpowering Fortunato with deceit and betrayal leading to his ultimate downfall.