The main group of heretics, which posed a threat to the church, consisted of the Cathars, Albigensians, Manichaeans and Good Christians.Pope Innocent III spearheaded the first notable action against heretics; he said that any act of heresy would be considered treason. This decree would be known as Vergentis Ad abolendam. If you were found guilty of heresy then said person would have their goods taken and their children reprimanded. This idea however would fail, in the following years it showed that in France this decree would be ineffective. During the Fourth Lantern Council in 1215 it was emphasized that the main goal of the that meeting would be to discuss the rejuvenation and reformation of the church. Canon 3 was one of the more important decrees to come out of the council meeting. It stated that anyone that went against the church in any which way or form would be labeled a heretic and they would be sentenced to death. Canon 21 was also came forth out of the Fourth Lantern which stated that all Christians were required to partake in a confession of sins once a year at Easter. In the early thirteenth century Emperor Fredrick II added new canonical laws regarding the bible and mandated that anyone caught for heresy would be burned at the stake. During the council of Toulouse, Gregory IX issued 18 canons and deputized many local priests to seek out heretics and “deal with them”. Any homes or buildings associated with heretics were to be destroyed and left in ruin. The most astounding decree in the council of Toulouse was prohibition against personally owning Biblical texts. Gregory IX also decreed Vox in Rama, which also tried to strike down heretics. Gregory IX as previously stated deputized many priests to try and fight heretics, by doing this he helped eradicate heretics on a bigger scale then ever before. When heretics would undergo persecution there was found to be many shortcomings in with the system in use. Accusatio was a flawed system that encouraged persecutors to burn the defendants to determine innocence. After pointing out obvious flaws in the system the church switched to inquisito, which was a more stable method to test innocence. Judges would now take into account evidence and eyewitness accounts instead of using the examination of scabs to determine innocence. There was an obvious bias in against the judging of people accused of heresy. The church didn’t want anyone accused of heresy to be set free in fear of judge getting the verdict wrong. This resulted in many people who were charged with heresy to have an unfair ruling which led to death.