Nether portals are your ways in and out of the Nether. To reach the Nether, you’ll need to build a vertical frame of obsidian blocks in a 3x2 pattern. The corners don’t matter, so you’ll only need 10 obsidian blocks in total. Once you’ve built the frame, use flint and steel to ignite the inside of the frame, and enter the portal to enter the Nether. Once you’re in the fiery Nether realm, you’ll notice a Nether portal right beside you. Keep track of it, because that’s your way out!