This tutorial assumes you have already

In this tutorial we’re going to add a new block to the game.

To start off, go to your ModEventSubscriber and create a public static void method called onRegisterBlocks with a RegistryEvent.Register<Block> as its only parameter. Next, annotate the method with @SubscribeEvent. Your method should look something like

public static void onRegisterBlocks(RegistryEvent.Register<Block> event) {


Now go inside the onRegisterBlocks event subscriber method and add a call to the event’s registry’s registerAll method with event.getRegistry().registerAll();. Inside the final brackets (The ones that invoke registerAll) make 2 new lines and create a new Block with new Block(Block.Properties.create(Material.ROCK).hardnessAndResistance(3.0F, 3.0F)). This simply creates a new Block with the ROCK material, a hardness of 3 and a resistance of 3 (very similar to iron ore), but we need to also set its registry name. Do this by passing the new Block as the first parameter of a call to the setup method, and the String "example_ore" as the second parameter.
All this combined should look like

	setup(new Block(Block.Properties.create(Material.ROCK).hardnessAndResistance(3.0F, 3.0F)), "example_ore")

Now run the game and you should be able to put your block in the world with /setblock. Your block won’t have an item counterpart, a model or do anything yet though.

If you run into issues please make sure you look at the following image before asking for help. (Make sure you’ve annotated your method with @SubscribeEvent, that the method is a public static void and that the method has a single parameter (The class of the parameter must extend net.minecraftforge.eventbus.api.Event))
Why isn't my Event Subscriber Working

1.10 - BlockItem