Create a hauntingly detailed drawing that explores a dark, enigmatic world steeped in horror and dread. The style should feature intricate hand-drawn textures with bold, jagged lines and layered tonal washes, creating intense contrasts between deep, saturated shadows and stark, glaring highlights. The color palette should be saturated and chilling—blood-reds, bruised purples, sickly greens, and ashen blacks—punctuated by sharp, unnatural whites that cut through the darkness. The atmosphere should feel oppressive and nightmarish, blending visceral gore with surreal, otherworldly elements. The focus will be on an isolated lighthouse perched on jagged cliffs, its beam cutting through a stormy night. Inside, the keeper’s body lies broken at the base of the stairs, their face frozen in terror. Above, a massive, tentacled creature emerges from the lantern room, its glowing eyes casting an eerie light. The walls are covered in strange, pulsating growths, and the air is filled with the sound of distant, unearthly wails. The composition should exude menace and unease, immersing the viewer in a chilling, vivid nightmare.