What do you need to go to the nether?

To go to the Nether in minecraft, you need to create a Nether portal using obsidian blocks. You'll need a minimum of 10 obsidian blocks arranged in a rectangular frame, with a height of at least 4 blocks. Once the portal is built, ignite it using flint and steel or another fire source to activate it. You can then step through the portal to enter the Nether dimension.