Create a hauntingly detailed digital illustration of two horned, demonic creatures with glowing blue eyes, their mouths agape in a scream, set against a backdrop of a pentagram symbol. The creatures' skin is a blend of gray and white, with intricate, detailed textures that evoke a sense of ancient, mystical power. Their horns are long and curved, with a frosty sheen, and their eyes burn with an otherworldly blue light. The pentagram symbol behind them is rendered in stark white, with a subtle glow that seems to emanate an aura of mysticism and foreboding. The overall atmosphere is one of dark, mystical horror, with the creatures' screams seeming to pierce through the darkness like a chilling wail. **Style:** The image should be rendered in a style reminiscent of dark fantasy art, with a focus on detailed textures, intricate patterns, and a muted color palette that evokes a sense of foreboding and dread. The level of detail should be high, with every aspect of the creatures and the pentagram symbol rendered with precision and care. The overall effect should be one of haunting, unsettling beauty, drawing the viewer in with its dark, mystical allure.