I draw on the internet often for RPG ideas and inspiration. These picture are art, from a work called Cycles of Decay by Christopher David White.
It may look like wood and bricks but it’s all ceramic. Very clever stuff.
So many possible ideas – my first thought was “Ents”; Tolkien’s famous tree-people. Then I noticed the size compared to the ruins of the brick shack the fingers clutch and the “Wood Elemental” from the second HellBoy came to mind.
The Wood Elemental may still not be large enough so perhaps this are the mysterious remains of a forest diety or perhaps the bricks are gnomish, imp or pixie in origin.