A detailed Minecraft monolith, 14x1...

A detailed Minecraft monolith, 14x14 base and 36 blocks tall, built with deepslate materials. The structure should be irregular, asymmetrical, and have strong depth variation, avoiding a simple flat tower look. Use a dark palette: deepslate, cobbled deepslate, polished deepslate, deepslate bricks, cracked bricks, chiseled deepslate, with small accents of basalt and blackstone. Add stairs, slabs, and walls to create layered, eroded surfaces. On one side, carve a large semicircular recessed cavity extending toward the center. Inside it, place a single diamond block floating freely, not touching any blocks. Use hidden lighting (sea lanterns or glowstone) to softly illuminate the cavity. Style: dark, ancient, brutalist, slightly futuristic, with strong texture and depth.