Venice City, Cannaregio district, inside a high-end apartment.
Having finished their hunt, Tiberius returned to the apartment and saw his brother Gaius lying on the sofa watching TV.
"How many people did you eat?" Gaius asked casually.
"Three," Tiberius wiped the corner of his mouth, "plus about twenty mice, and brought one back for you by the way."
Extracted from the Flesh Sequence, the Devouring Law allowed for more efficient harvesting of Spirituality by devouring living beings. With the Anti-Demon Magnetic Field preventing the natural replenishment of Spirituality, consuming humans was the quickest way for the two demigod brothers to restore their Spirituality.
Once they had gathered enough Spirituality, they could use the contaminating ability of the Flesh Sequence to feed their own flesh to the surrounding mice, transforming them into their flesh puppets and thus manipulating them to monitor the main thoroughfares of Venice City, in search of Agrippina's whereabouts.