Her movements however, they seemed only to cause this vine to constrict around her hind hooves, tightly squeezing them together as the vine takes on animate motion, creeping and twisting, twirling and growing around her hind legs and enveloping them. The sticky tendrils grip her fur and venture upward, curling around her chest, flanks, and up to her neck, squeezing tighter and tighter. Mercury felt a tug on her hooves that were securely encased in the vines as they began to fuse together at the base, turning to a much stiffer sheath of wood and rooting her hooves firmly to the ground.
 
The mare yelped as the embrace of the vines thickened around her, wildly flailing her limbs and tugging at the roots that held her fast to the spot. The spreading wood from the base of the vines crept further upward, encasing her hind legs up to her hips and squeezing almost painfully tight. She felt the tingle of magic in her legs, sensation deadening as the wood bulked up around them, seemingly as if she were merging with the wood… to her dismay she spots the bark upon the trunk forming around her leeching the color of her coat upon itself, a sandy beige, lightening all along its length.