Plant Demon Drone

Another one from the evil forces in my old tabletop RPG.

Plant Demons, based loosely on Vervoids from Doctor Who, are... unsurprisingly a race of demons composed of plant matter and driven by a central will.
They have the power to meld with the Earth and travel virtually undetected through the ground before rising up to strike.

Blunt force trauma has virtually no effect on these demons, and they can alter their limbs to form barbed tentacle-vines with which to fight and bind targets.
They can also attack with an extending tentacle on their face that leaves poison vines in their victims.