Obsidian is a rare and useful resource that you can use to craft strong obsidian slabs. You can find it in a cave, but you will encounter many obstacles along the way, such as tough enemies and lava. In this guide, you will learn the location and how to get Obsidian in Lego Fortnite. Before you go looking for it, you will need to prepare a bunch of stuff, such as getting some protection from extremely hot conditions, so as not to get baked near the lava.