A Minecraft datapack that makes it so that the iron/copper chain crafting recipe gives you 3 chains instead of one.
Note
On 1.21.3, 1.21.4, 1.21.6, and 1.21.7 when you add the datapack during world creation the game may tell you that the datapack was made for an older version of Minecraft. This datapack is compatible with the newer versions so you can ignore this warning