Tree blights resembled dead trees or Treants, generally with dead branches that were oddly spongy; their bark was filled with blood, generally supplied by a nearby Gulthias Tree. They were dim-witted but malevolent and extremely dangerous, looking to cause carnage with their massive bodies. They were significant threats to objects and structures, and could either bludgeon creatures with their branches or grasp and constrict them with roots that stemmed from their base.
Unusual for a plant, tree blights were carnivorous, with a large mouth near the bottom of their trunk filled with strong teeth of sharp bark. They were known to fight alongside other Blights, but could not stand other tree blights or treants.