A large, sturdy storage unit designed with a semi-realistic prehistoric aesthetic, featuring a robust wooden frame reinforced with metal brackets and leather straps for durability. The surface is weathered, showing signs of use with scratches and dents, and the wood has a rough, natural texture with visible grain. The vault door is thick and heavy, with a primitive locking mechanism made of bone or stone, and the overall shape is rectangular with slightly rounded edges to blend into the game's environment.