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This data pack allows duplication by using a new item called duplication stars, which can be made out of amethysts and nether stars. This wiki will guide you on how to use this data pack, and this data pack's commands and configurations.
v1.0 to v1.1.1
All you need to do is just to throw the item you want to duplicate and the nether star on top of obsidian and let magic do the rest...
v2.0 to v2.1.1
There are two (setup) difficulties: Easy and Normal
Easy
All you have to do is place down a hopper and in the hopper, put at least 2 nether stars in the middle, and put the items you want to duplicate in the first and second slot. But leave the last two slots empty.
And finally, strike the hopper with lightning. In other words, a lightning must happen near the hopper for the duplication to happen.
And here is the result!
Normal
All you have to do is place down a hopper and in the hopper, put at least 2 nether stars in the middle, and put the items you want to duplicate in the first and second slot. But leave the last two slots empty.
But this time, you must place 4 lightning rods next to the hopper. Like this:
Then, just strike one of the lightning rods with lightning.
And here is the result!
If you want to duplicate, you will have to make a duplication star.
There are 3 (setup) difficulties: Very Easy, Easy (default) and Normal
Very Easy
In this difficulty, unlike others, you won't need lightning. All you have to do is to place down a hopper and disable the hopper with redstone. You can do this by placing a lever next to the hopper and turning the lever on.
In the hopper, put some nether stars in the third slot, and in the second slot, put some amethyst shards. The amount of amethyst shards must be equal or higher than four times the number of nether stars. In other words, you will need (4 * the number of nether stars) amethysts. You can change the amount of amethysts required for each nether stars in the configurations.
Now, throw a single copper block on top of the hopper. If you do this, the copper block will disappear, but you will end up with a duplication star: (Ignore the "Hold Ctrl to show more NBT", and the redstone lamp is optional)
So with this information, You will now need to obtain 2 duplication stars (The amount can be changed in the config). After that, put those duplication stars in the third slot of the hopper you used earlier to make duplication stars. Now, put the items you want to duplicate in the first and the second slot of the hopper.
Now, make a lightning strike happen near the hopper again. (Just like the last time) And the items will duplicate!
Easy
All you need to do is to place down a hopper. Optionally, and recommendably, place down a lightning rod next to it.
And in that hopper, put some nether stars in the third slot, and in the second slot, put some amethyst shards. The amount of amethyst shards must be equal or higher than four times the number of nether stars. In other words, you will need (4 * the number of nether stars) amethysts. You can change the amount of amethysts required for each nether stars in the configurations.
Now, make a lightning strike happen near the hopper. You can do this by placing down a lightning rod next to the hopper and throwing a channeling trident on the rod. If you do this, you will end up with a duplication star: (Ignore the "Hold Ctrl to show more NBT")
So with this information, You will now need to obtain 2 duplication stars (The amount can be changed in the config). After that, put those duplication stars in the third slot of the hopper you used earlier to make duplication stars. Now, put the items you want to duplicate in the first and the second slot of the hopper.
Now, make a lightning strike happen near the hopper again. (Just like the last time) And the items will duplicate!
Normal
You will need to place down a hopper, followed by 4 lightning rods next to it and 9 copper blocks below. It should look something like this:
and in the hopper, put some nether stars in the third slot, and in the second slot, put some amethyst shards. The amount of amethyst shards must be equal or higher than four times the number of nether stars. In other words, you will need (4 * the number of nether stars) amethysts. You can change the amount of amethysts required for each nether stars in the configurations.
Now, make a lightning strike happen on one of the lightning rods. You can do this by throwing a channeling trident on the rod. If you do this, you will end up with a duplication star: (Ignore the "Hold Ctrl to show more NBT")
So with this information, You will now need to obtain 2 duplication stars (The amount can be changed in the config). After that, put those duplication stars in the third slot of the hopper in the setup you used earlier to make duplication stars. Now, put the items you want to duplicate in the first and the second slot of the hopper.
Now, throw a copper block on top of the hopper (Just like the last time) And the items will duplicate!
/function sul4ur:star_dupe2/config: Opens the configurations menu. They can look different in each version.
v2.0 to v2.1.1
In v2.2, use /function star_dupe2:scores/remove, then you can delete the data pack from your world folder or use /datapack disable.