Purity is the ability of Enoch to purify one of his weapons, The Arch. Only a person with the power given by him to god can purify the weapon. As Enoch sends souls to Heaven, his weapons becomes more pure and even more powerful.
- "The Arch, which fell to the earth with the fallen angels, has lost its true heavenly power, and has turned into a corrupt tool used only for slaughtering. Only one with power bestowed by God may purify a weapon.
Starting with nothing, Enoch must reclaim the Arch from an enemy, purify its blade, and make it his own in order to send streams of souls back to Heaven."