Obsidian Slabs are needed for upgrades and new equipment in LEGO Fortnite. Check out this guide to find out How To Get Obsidian Slabs In LEGO Fortnite.
How To Get Obsidian Slabs In LEGO Fortnite
You’ll need to find caves in the desert biome. Make sure you have heat resistance and bring a torch!
The obsidian are purple chunks on the wall, usually on the ceiling – see the picture below for reference.
On that note, make sure to bring wood and a level 3 pick as well to mine it and get up there.
Go back to your base, put it in the stone crusher, and you can make obsidian slabs – one per piece.