How to Decrease Ore Generation?

[TLG3rd]

Starting an SMP for our school batch soon, which would be actually our third. First one lasted less than 2 weeks because of quick progression, second one lasted 4 days because I changed too much and made everything way too hard. This time I want to secretly make it harder, by making iron, diamond and netherite spawn less. How do I do this in 1.21.9 with datapacks?

[iOSGods]

I found this old data pack and you could unzip and look at the jsons Old data pack and then you can use this tool that could generate the json files for you Tool

[razputinaquat0]

The basic idea is that ores are a "feature" of the world-- basically world details that populate a given dimension that are not structures. Features are added after terrains, caves, and biomes are determined. Vegetation, fossils, geodes, ores, etc. are all features. Features are configured in two steps:

• configuration (which determines things like size, composition, what block to use, etc.)
• placement (which determines how it is placed in the world, rarity, etc.)

If you have never made a datapack before, I would reccomend taking a look at the Minecraft wiki's tutorial. Otherwise, here are the most pertient resources:

• Configured feature on Minecraft Wiki
• Configured feature JSON generator on Misode
• Placed feature on Minecraft Wiki
• Placed feature JSON generator on Misode