Clinger

A Clinger is a hardmode enemy that use the plant AI and resembles a corrupt Man Eater. Clingers launch orbs of cursed flames at the player, which can inflict the Cursed Inferno debuff. Clingers are found in the Underground Corruption biome.

Clingers are one of the two creatures that drop valuable Cursed Flames, the other being the World Feeder (however the clinger is the only one that actually uses the cursed flames). Though they are more common than world feeders underground, they don't appear on the surface. A player who intends to use Cursed Arrows or Cursed Bullets should make an effort to kill them whenever possible.

Clingers will not launch their projectile for a couple seconds after being struck by knockback; players can use this to their advantage and prevent a Clinger from being able to retaliate until it is slain. Additionally, Clingers' projectiles do not travel through solid objects, which players can use to their advantage while approaching.

Strangely, despite being able to shoot cursed flames, they are not immune to the Cursed Inferno debuff.

History
Cracheur