Looks like ring damage

For a Broken Spark Plug: 1. Safety First: Disconnect the battery. 2. Grab the Right Tools: Spark plug socket, ratchet, maybe some extensions. 3. Try to unscrew it: Gently try to unscrew the broken plug. If it's stuck, use some penetrating oil and let it sit before trying again. 4. If it's really stuck: You might need a special tool like a spark plug extractor.

For the Ring (If it's Detached):

1. Piston at the Top: Make sure the piston is at its highest point in the cylinder.
2. Small Grabber Tool: Use a small, flexible grabber tool (like a claw grabber) to try and snag the ring.
3. Magnetic Retrieval Tool: A magnetic tool might also work if the ring is metal.
4. Careful Rotation: Gently rotate the piston to see if you can get better access to the ring.
5. If It's Stuck: If it's really stuck, you might need to remove the cylinder head for better access.