The Obsidium is a new biome which is added by the Enigma Mod. It is always towards the bottom of the cavern layer, directly under the player's spawn point where it extends all the way to the Underworld. The player can easily reach the Obsidium by digging a hellevator straight down from their original spawn point. The biome's shape is of a heart with a little triangle at the bottom, the part which leads to the underworld. The Obisidium has many unique enemies, a unique boss as well as unique loot and tiles. The Obsidium is mainly comprised of obsidium rock and obsidian as well as abundant amounts of Obsidium Ore.
sis commeatus posuit aliquid, praesidia autem levia, jam sunt, ut puto, ejus in potestate. Nam quassare eas machinis coeperat. A Schafhusianis poposcit transitum et creduntur concessuri id homines nec mali nec malevolentes, sed praetimidi et quovis modo medios se ostendere cupientes. Ex eo capitur conjectura aut Laufenburgi aut Rinfeldi obsidium moliri hostes.