Hydra
The Hydra is a mythical serpentine creature with multiple heads, traditionally depicted as a monstrous water serpent. In the context of the abbey, it appears as one of the many grotesque figures carved on the portal of the church, forming part of a vast bestiary of Satan that surrounds the entrance. The portal's sculptures depict a world of monsters and damned souls, serving as a dark vestibule to the vision of the Seated One in the tympanum above. The Hydra, along with other creatures such as dragons, griffins, and chimeras, represents the forces of evil and chaos that are defeated by Christ and his saints. Its presence on the portal underscores the theme of the struggle between good and evil, a central motif in the novel's exploration of medieval theology and the nature of sin. The Hydra's inclusion in this bestiary also reflects the medieval fascination with monstrous beings as symbols of moral and spiritual dangers, a concept that Jorge of Burgos later condemns in his critique of the marginalia in the scriptorium. The Hydra, as a creature of myth and legend, thus serves as a visual and symbolic element that reinforces the novel's themes of knowledge, heresy, and the battle between order and chaos.