Blockus Mod (1.20.1, 1.19.4) - Just Add Too Many New Blocks - 9Minecraft.Net
Magmaox Mod adds the new 1.10 Nether blocks for you building purposes. Version 1.0 Magma Blocks,Red Nether Bricks,Nether Wart B. - Minecraft Mods - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum
Adding CUSTOM BLOCK to Minecraft 1.16.5 with Forge
Top 5 Minecraft mods that add new blocks to the game