Boss monster from the horror-themed, now barely functional MMORPG Requiem: Bloodymare / Memento Mori / whatever.
Blender is able to import animation files for most models from this game, so different poses are possible if there is demand for them.
I have used the model's texture to add some detail to the low-poly model via displacement. Usable as is for a 28mm or similar scale boss monster. Printing at larger scale would require some further cleanup and remodeling. Printing at very small scale would require making important details more prominent.
The author hasn't provided the model origin yet.