This badge requires bringing the Ancient Idol (Golden Bing Bong) from the Tomb to the Kiln. The Tomb spawns in the Mesa biome, but the entrance is only open on certain days. The entrance will be a hole in the ground near the starting cliff of the Mesa, you will then need to traverse a short maze of passageways and cross a death pit (chain launchers are very helpful for this). You will then find the Ancient Idol, which weighs a significant amount but grants invulnerability from all sources of damage while held actively in your hands. To get the badge, someone must bring this idol through the Mesa and Caldera to the Kiln and drop it in the lava at the bottom of the Kiln. This will unlock the badge for all scouts in the expedition.