Heresy I: You become resistant to Mood and Energy effects on a street under a Rook attack. You also suffer less of a mood penalty from poisoning trees.
Heresy II: You suffer even less from Mood and Energy hits on a street under a Rook attack. You can also cause a full blown Rook attack using martial imagination after three Rook Rolls on a single street in a single game day.
Heresy III: You are immune to the Mood and Energy effects on a street under a Rook attack. You also suffer no more guilt from poisoning trees.
All mutually exclusive with Piety I, i.e. you must unlearn Piety I or not train it to gain these skills. Prereqs are the same as Piety I.
Game breaking? Goes against the grain of the social experiment that is Glitch?