Did You Know? Tremor and Set Defense

Did you know that when a Runeshaper uses Tremor on a charge against a model with set defense it suffers the -2 penalty to hit against the set defense model?

Applicable Rules:

Tremor (*Attack)
Tremor affects every model within 2" of this model and does not require a target. Make one magic attack roll. If the roll equals or exceeds the DEF of an affected model, it is knocked down. This attack roll cannot be rerolled. This model can make a Tremor special attack if it charges.

Set Defense
A model in the front arc of a model with Set Defense suffers -2 on charge, slam power attack, and impact attack rolls against the model with Set Defense.

Here is an infernal ruling from the Privateer Press Rules forum to explain the rules interaction: Tremor-vs-Set-Defense