Inside-out treasure chest beast

Prompt

A small treasure chest creature turned inside out, about 38 units long and 28 tall at 64 units per block: a wooden strongbox with brass corner plates whose red velvet lining and nailed hinge are on the outside and whose hollow shell is open underneath, four root legs and curling root tendrils growing from the lid, a padlock chain for a tongue, two gold nugget eyes, and dirt clumps on its back.