Finding rare items in Minecraft such as enchanted weapons, diamond armor, and special enchantment books is always a great feeling. But sometimes the find is so rare and special that it seems almost impossible. With the addition of the trial chambers and the vault with the Tricky Trials update, the chances of getting rare items have gone up. And it seems that we already have one example of how good some loot from these trial chambers can be.
A Minecraft player and Reddit user named Bulliedbywamen shared an image on the subreddit of the game, showing the qualities of a diamond chest plate their friend had found in trial chambers. The shared image shows the chest plate enchanted with Protection IV, Fire Protection IV, Projectile Protection IV, Unbreaking III, and Mending.
These are some of the most powerful enchantments one can get in the game, and certainly, it is very rare to find one item enchanted with all of them. The original poster did not mention whether they got the chest plate from the vault, the ominous vault, or from another treasure chest.
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Reacting to this post, user Rabbulion commented that this should be the strongest chest plate ever, but they are not sure about the game mechanics of the enchantments. The original poster had asked whether Protection enchantments cancel out each other. Another user named ClearMind commented that the chest plate is missing the Blast Protection.
User boltzmannman wrote a long and detailed post about the chest plate and answered the question the original poster had asked. They mentioned how each Protection level adds 4% damage protection, so each armor piece with Protection IV prevents 16% of the incoming damage. They continued further and answered the question.

Another user named gUBBLOR mentioned that the chestplate is overpowered and it's a rare find as the enchantments stack up and become too powerful. A user named Holala13 commented that yes, these enchantments do stack up.

gheendade commented something interesting. They said that Mojang should keep such enchanted items in the game if the post is legit, as it gives them a great incentive to explore and clear out the trial chambers, beating the breeze and other dangerous mobs.
Another user named EksEss agreed that this kind of loot would be great to find in the trial chambers. User vivam0rt mentioned that it's very unlikely to get a rare item such as this or else they would have seen more posts like this.
Rare loot in Minecraft trial chambers

The trial chamber is an underground palatial structure that players can explore to find rare loot. These trail chambers have the newly-added block called the vaults that can be opened with trial keys. Vaults contain rare loot items and while they are worth finding, it is not easy to do so.
Trial chambers in Minecraft are filled with dangerous mobs, the most notable being the breeze that cannot be attacked using projectile weapons. It uses wind charge to knock players back.
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