How do you find the most unmaintainable code in your codebase? What will you prioritize in your next technical debt spike, and why? In this talk you will learn how you can use RubyCritic, SimpleCov, Flog, Reek, and Skunk to slay dragons in your next refactoring adventure! Find out how the relationship between churn, complexity, and code coverage can give you a common language to talk about code quality and increase trust in your code.