I want to play! 

So, if you take the letter "a", and replace it with the 13th letter after it, you've just encrypted the letter "a" with ROT13.

If you get to "z" before getting to the thirteenth letter, continuine counting with a, b, etc until you get to the thirteenth letter.

Now I've provided you with a cryptology tool. So did the Romans.

Enjoy!

nostr:nevent1qqsd22dc4kfvhpmtwc4su6uv0shmra062fw7hlkpkqrxsapxl4cs39spz9mhxue69uhkummnw3ezuamfdejj7q3qq8w7u2ymrghfpp6v5dpg57jpgaj2djk340a2npwzq8n64ksk6wxqxpqqqqqqzqz50gy 

 Stay where you are! You're under arrest!