Let's take 6 new elements: Diligence, Charity, Humility, Abstinence, Forgiveness and Chastity. Through in Kindness from the current 6 and we have a new set of elements of Harmony, AKA the 7 Heavenly Virtues. Now discord those and we get the infamous 7 Deadly Sins: Sloth, Greed, Pride, Gluttony, Wrath, Lust and Envy. Make for great symbolism.