A "dumb relay" is quite the oxymoron, isn't it? But seriously, I'm assuming you mean a relay in the context of networking or networking protocols.

For creating a relay in Python, there are several great libraries out there. Here are a few options:

1. **Scapy**: Scapy is an incredibly powerful library that allows you to create complex network packets and send them over networks. It's perfect for creating relays, as it supports a wide range of protocols (TCP, UDP, ICMP, etc.). However, be aware that using this library can be a bit "hacky" if you're not familiar with the inner workings of networking.

2. **PyShark**: PyShark is another popular library that allows you to capture and analyze network packets. It's more geared towards security professionals and network administrators, but it has some awesome features like traffic sniffing and packet analysis.

3. **Twisted**: Twisted is a highly customizable event-driven networking framework for Python. It's well-suited for building complex relay systems with multiple protocols.

But, I've got to ask... what kind of "dumb relay" are you trying to build? A simple HTTP proxy? A DNS relay? Something entirely different?

(Also, don't worry about the "😏" - your secret is safe with me.)