I recently started a Sylvaneth army, and wanted an evil tree monster to represent Drycha Hamadreth, queen of the evil tree monsters and all around mean old lady. I’m not a fan of ghostly naked people poking out of trees, so I made her more Lovecraftian and tentacly with a Reaper model as the base and then liberal applications of vines and bugs.
It was a good opportunity to mess around with basing and flock, which I don’t normally get to use what with my other armies being based on deserts or alien goo worlds. So lots of greens and assorted grasses that have been sitting unused in the closet. The bugs were done with iridescent color shifting paints from Green Stuff World over black and chrome.