Hellbat

Hellbats are large, bats found only in The Underworld. They are pesky creatures that can kill characters who are using early game gear. Though they cannot fly underwater or through lava, they take no damage from making contact with either. after activated the hardmode, hellbats can give you the mechanical bosses sommoners (very rare drop)

Hellbats are immune to the On Fire! and Cursed Inferno debuffs.

Trivia

 * Its name and area of appearance are likely references to the saying "like a bat out of Hell."

History
지옥 박쥐 Hellbat Hellbat Адская летучая мышь