Verrifant's homeplanet was chosen by the Great Houses to be cryptoformed into one of the nine Homeworlds. Verrifant was present during the cryptoforming and he was mutated into a regen-inf soldier. He died in 3591 while repelling invaders from the new Homeworld.
When he was resurrected in the City of the Saved, Verrifant received a human-normal body type like he had had before being mutated. However, in something similar to Stockholm syndrome, he retained his devotion towards the Great Houses.
In AF 262, Verrifant opened the Uptime Gate for Mirraflex's invasion force of timeships led by Mantissa. After the failure of this invasion, which was later termed the "Timebeast Assault", Verrifant fled the City and willing offered himself to be once again augmented into a regen-inf soldier. (PROSE: The Book of the War, Of the City of the Saved...)
The Book of the War noted that the cryptoforming of Verrifant's homeplanet began in the universe when in the City he was already a clear candidate for Lord Mayor, at a time in which Mirraflex's Lady Armourer Mantissa was already interested in attacking the City of the Saved. This suggests that Mantissa ordered the invasion of his planet and retroactively made Verrifant a Homeworld agent because she knew that, in his future, he would be a prominent politician in the City. (PROSE: The Book of the War)
Verrifant's Night became an annual holiday in the City in which people would express their hatred of Verrifant by destroying his likeness. (PROSE: Of the City of the Saved..., The Book of the War) He left the general public with a distrust towards individuals in the position of Lord Mayor. Verrifant's three immediate successors were perceived to be entirely weak. "Verrifanting" was used as an insult meaning "traitorous". (PROSE: Of the City of the Saved...)