This is a very strong entry for me. The Wrath of Zagan draws from a strong source for its inspiration, the "Barbarian Adventure" genre of the likes of Conan the Cimmerian, Red Sonja and dozens of others, often battling serpentine foes in forgotten temples. This is a great spin on the concept, and is clearly made with a love for the inspirational material.
WoZ establishes a strong conceptual challenge, building a coherent narrative with a beginning, middle and end, but also creating a world that fits perfectly with the genre it is from. The details of the region's past and the backgrounds of some of the characters, while subtle as a nice touch.
The formatting and design is functional and flows easily, largely following those found in the official To Change manual, allowing for easy reference for those familiar with the system. It is readable, intuitive and clean, setting up different points of the action, and providing a simple way to randomly generate encounters befitting the narrative. These encounters, and the ending, really feel like they would fit nicely into a Hyborean Age Pulp magazine.
The biggest issue I have with this module is the Moves. I feel that The Slithering Chaos seems a little vague. Thematically, I see how it works, but it seems like mechanically, it has the potential pitfall of coming across as arbitrary.
Fantastic work!