Isometric concept art of a complete...

Isometric concept art of a complete 360-degree ruined Gothic boss arena, Frost-Bite Keep, showing a fully enclosed structure with no edges cut or cropped. Built from deepslate bricks and blackstone, the layout features a completely destroyed arched entryway on the left, reduced to shattered stone, broken wood, and blue ice. Icicles and frozen waterfalls drape over the cracked facade. A circular central courtyard leads to an elevated altar glowing with cyan soul lanterns. Every angle of the circular perimeter is fully visible and rendered. Clean line art, detailed pixel-art texturing, seamless schematic blueprint layout, dark fantasy RPG asset style.