https://allthatsinteresting.com/alexander-pichushkin
Congratulations on solving the META puzzle from the FIRE set!
As the first one to read this message, you have earned a free hint my friend! Just formulate your question and ask me on Twitter, starting with: "I am the enemy of Alexander Pichushkin" and I will give you a nudge in the proper direction for any puzzle from any set you have selected!