Structure Rings!

I think that there should be Structure rings that could be found in different structure around the world, you could find a gem that could be added to a crafted golden ring using a smithing table. One could be found in the end city that could make ender pearls do less damage. Another could be found in the ancient city that could reduce mob detection range. Lastly one could be found in the nether fortress that could reduce damage by fire! They would only have a 0.5% chance of showing up and they wouldn't be to strong.