Three days after the encounter battle, or the fifth day since the team left Twin Bridges Town, Volcano Fortress finally came into the mercenaries' view.
Even from tens of miles away, the silhouette of the black fortress was the most striking sight on the horizon. The main body of the fortress was completely hidden within the mountain, with only its walls, over eighty feet tall and made entirely of obsidian, exposed. Manually cut stones stacked together formed a resistance against Transformation System Spells, limiting what Spellcasters could do in siege warfare. Furthermore, the obsidian itself had a resistance to flames, rendering the demons' war machines that launched giant Fireballs ineffective against it.