Vinegrown Shambler (5e Creature)
From D&D Wiki
Medium plant, unaligned
Club. Melee Weapon Attack: +3 to hit, reach 5 ft., one creature. Hit: 3 (1d4 + 1) bludgeoning damage.
The vinegrown shambler is the first stage in the life of a vinegrown. The shambler when outside of it armor it is a tiny four legged spider of thorny vines. It protects itself by crawling into a humanoid corpse. It unravels itself inside the corpse and controls it like a puppet. In combat it throws itself into the center of combat and withdraws from its armor and retreats.