Monster from the horror-themed, now barely functional MMORPG Requiem: Bloodymare / Memento Mori / whatever. Four different poses.
Blender import is somewhat glitchy for this model, but some more poses could be done if there is demand for them.
One pose test printed on Prusa Mini, in one piece, lying on the back, with supports. The most problematic bits were the spiney growths on the right "arm", and they are the first part that gets left out when scaling the model too small.
The author hasn't provided the model origin yet.