I think there should be Ender Rubies.

Ender Rubies should be added since many players have wanted rubies since their first addition. They would spawn in the outer end islands. They would also have the rarity of diamonds. They would be used to create hammers, hammers could be used as a new melee weapon while also being able to repair anvils by dropping iron ingots on them and then hitting on the ingot with the hammer. Piglin Brute arm guards could also be involved in this as people have wanted them for a long time. These arm guards would have a 100% drop rate as Piglin Brutes are limited in a world. You would upgrade them using rubies, increasing their durability.