Dark Fantasy Illustration: Dragon's Lair Battle

A captivating dark fantasy illustration depicting a dragon's lair. The scene showcases a large, menacing black dragon with red eyes and a sinuous body, perched on a hoard of gleaming gold coins and precious gems. Its wings are spread wide behind it, exuding an aura of power. The lair itself is a dimly lit, cave-like space, with a fiery lava river flowing through it. The only light source emanates from flickering torches embedded in the rough, stone walls. At the entrance of the lair, a lone adventurer stands with his sword drawn and shield raised, ready to confront the formidable dragon in an epic battle.