A stylized, polygonized 3D treasure chest from the medieval fantasy era. The chest is made of rough-hewn wooden planks reinforced with worn, rusted iron bands. It has a bulky, over-exaggerated padlock on the front and large iron hinges on the back. The wood texture is low-poly with visible grain, and the metal parts have a slightly jagged, polygonal look. The lid is domed, slightly arched, with a few missing rivets for a weathered look. Add glowing magical runes faintly carved into the edges, emitting a soft blue light. The chest sits on a stone slab with moss creeping over the corners, giving it an ancient, enchanted dungeon vibe. Use a color palette of rich browns, dark greys, and mystical blue accents.