You see a possessed tree.
Notes
It looks like a Haunted Treeling. It can be destroyed by the Mounted Thorn Knight in one blow.
Abilities
Melee (0-162+)
Poison missile (0-86+)Damage Taken From Elements
Physical 
Death 
Holy 
Ice 
Fire 
Energy 
Earth 
Drown 
Location
A dungeon here, accessible through the Desecrated Glade.
Behaviour
Unknown
Strategy
Unknown
Loot
There is no loot data for this creature. Please consider subtmitting loot logs for this creature using the Loot Statistics parser.