Idol wizards inevitably form connections with one another.
Just as prophet wizards can interfere with, obscure, or embellish each other's prophecies, and as transformation wizards can hasten, interrupt, or invert each other's transformations... idol wizards also influence each other.
But their influence is more metaphysical.
It is an influence based on the level of "destiny".
Powerful idol wizards affect weaker idol wizards within a certain range, making them increasingly similar to themselves in various ways, known as the "Law of Similarity" of the idol school.
This rule, when applied to idol spells, is also the most commonly used spell "Shadow Substitute", which is to "use a person with the same name to replace another as the ritual target".
