Create an awe-inspiring digital illustration featuring a heroic knight standing at the edge of a mystical realm, bathed in the radiant glow of a full moon hanging low in the darkened sky. The atmosphere is eerie and foreboding, with a focus on bold contrasts between the silhouetted knight's armor and the warm, golden hues of the lunar orb. The knight himself appears as a silhouette of valor, his eyes glowing with an otherworldly light as he spreads his majestic wings, reminiscent of a celestial messenger. In the background, a twisted, ancient tree stretches towards the moon like skeletal fingers, while a distant, gothic-style castle rises from the darkness like a monolith, shrouded in mist. The air is thick with the fluttering wings of bats, adding to the sense of unease and foreboding. The composition is balanced and harmonious, with the knight centered and surrounded by an aura of heroism. Incorporate elements of pulp adventure style, warm dreamy lighting, matte background, volumetric lighting, fluid acrylic, dynamic gradients, bold color, illustration, highly detailed, simple, smooth, and clean vector curves, vector art, and 3D shadowing. The overall mood should be moody, ethereal, and fantastical, evoking the feeling of stepping into a mystical realm. Your artwork should exude an air of heroism, bravery, and cinematic flair, as if it were a frame from a film noir thriller or a surrealist's dreamscape. Create a masterpiece that is cohesive, Dieselpunk-inspired, with realistic textures reminiscent of oil paintings, complete with subtle brushstrokes and rich colors.