Create a 3D model of a stone monster, aged and covered with thick layers of moss and lichen. The creature is crawling on all fours, with its body formed from rough, jagged stone, giving it an ancient and weathered appearance. Its texture should be gritty, with cracks running along its surface, revealing the age and erosion of the stone. Neon green eyes glow brightly, piercing through the darkness, adding an eerie, supernatural feel. The moss grows particularly around the joints and back, blending nature with the stone. Style: realistic with a fantasy twist, suitable for a dark, mystical setting. The monster should convey strength and ancient power.