During their recent work on the CCC-Server/CCC-Database repository, Siro focused on stabilizing Tachyon card cost validation logic within a Lua-based game development environment. They addressed a bug where spell and trap cards could incorrectly be used as costs for Tachyon, ensuring only monster cards are now valid. Siro’s approach involved refining the Lua script’s cost filter and validating edge-case scenarios to maintain consistent gameplay rules. Their contribution improved rule enforcement and reduced the risk of balance issues from misapplied costs. This work demonstrated Siro’s scripting proficiency and attention to detail in maintaining robust game logic and server-side validation.