Spirit Village and Endgame Merchant

I suggest adding a rare structure called the Spirit Village. The Spirit Village would only appear after the player has defeated the Ender Dragon, the Wither, and the Warden. After these requirements are completed, the village could appear at a random location in the Overworld for only a few minutes. The village would contain a unique merchant who cannot be killed. The challenge would be finding the village before it disappears. The merchant would accept three special endgame items: a Warden Core, a Nether Star, and a Dragon Head. All three would have the same trade value, so players could choose which difficult challenge they prefer. These items could all be obtained again, so none of them would be permanently unique. The merchant would offer powerful endgame rewards without replacing the importance of diamond and netherite equipment. The goal is to give players who have defeated the major bosses a new reason to explore, search, and take on difficult challenges.