Gilded Netherite Armor and Weopons(Using shards and Bosses)

We all have visited Bastions and have noticed the Beautiful Gilded Black stone. It is both uncraftable and rare as it is only found in bastions. But let us make it rarer, it can be made so that it can only be obtained by killing a new boss(or finding its stronghold). This boss could be anything from a new nether dragon to the upcoming Warden! The ability of this new type of netherite armour could be anything from making the wearer immune to fire to the wearer of this armour completely being Invisible to the Warden(I know that He cannot see). I have already seen another post on Gilded Netherite armour but I don't think that it should be made of literal blocks of gold, That's why I made a new post.