Ore redistribution

With 1.17 doubling the size of the underground and adding giant caves, ores will be significantly easier to obtain. For this reason, ores should be made a bit rarer, especially diamonds.  Larger caves should be rarer and smaller at higher y levels and more common and bigger deeper down.

Minecraft's shallow tech tree doesn't really allow for good loot in structures. Now is the perfect time to fix that problem by adding a new tier of materials. First, Buff diamond and netherite gear and reduce the power of 4/5 stage enchantments like protection. This new material would have the same strength as diamond currently has and be found just above y=0, also like current diamonds. Diamonds would be moved to only generate below y=-32. This new material could be a completely unique fantasy metal or gem. It would probably work best as an orange or purple material. Lapis lazuli should also be moved downwards with diamonds, as it has little use apart from the diamond requiring enchant table, also making enchantments require a bit more effort to obtain.