A colossal tower crafted from dark black obsidian juts out from a dynamic volcanic terrain. The apex of the immense spire is adorned with ceaseless flames exhibiting vivid shades of red and violet, creating a unique spectacle. A maze of molten lava rivers seeps around the tower's foundation, casting a fiery glow beneath. A complex design of age-old runes deeply etched into the hard rock surface, emitting a soft luminescence suggesting arcane power.