Feral Bite

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Expert and Master Mode-Only Content: This information applies only to Expert Mode, Master Mode, and worlds with these modes.
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Desktop/Console/Mobile-Only Content: This information applies only to the Desktop, Console, and Mobile versions of Terraria.

Feral Bite is a debuff that may be inflicted when a player is hit by certain types of bats and Duke Fishron in Expert Mode. It increases the player's damage by 20%, but lowers their health regeneration and may randomly inflict the Darkness, Cursed, Confused, Slow, Weak, or Silenced debuffs.


From enemy

From Duration Chance
Cave Bat Cave Bat 30–90 seconds 1/10 (10%)
Jungle Bat Jungle Bat 30–90 seconds 1/10 (10%)
Giant Bat Giant Bat 30–90 seconds 1/10 (10%)
Spore Bat Spore Bat(Desktop, Console and Mobile versions) 30–90 seconds 1/10 (10%)
Giant Flying Fox Giant Flying Fox 30–90 seconds 1/10 (10%)
Duke Fishron Duke Fishron 3–10 seconds 1/3 (33.33%)


While the player is afflicted with Feral Bite, they are occasionally inflicted one of the following six debuffs, picked at random. On average, a new debuff is inflicted every 20 seconds, though this is highly variable.[1]

Debuff Duration
Darkness Darkness 1.8–3 / 3.6-6 / 4.5-7.5 seconds
Cursed Cursed 0.45–0.75 / 0.9-1.13 / 1.5-1.88 seconds
Confused Confused 0.9–1.5 / 1.8-3 / 2.25-3.75 seconds
Slow Slow 2.1–3.5 / 4.2-7 / 5.25-8.75 seconds
Weak Weak 3–5 / 6-10 / 7.5-12.5 seconds
Silenced Silenced 0.6–1 / 1.2-2 / 1.5-2.5 seconds


  • While at the first look seeming like a rather weak debuff, the randomly occurring debuffs can cause major damage to a player. The Confused and Cursed debuffs can easily catch players on the wrong foot, especially when they are not aware of being under the influence of Feral Bite.
  • Having an Ankh Charm or Ankh Shield can eliminate all other debuffs generated by Feral Bite, making it technically a pseudo-buff.


  • Despite being Expert-exclusive, the debuffs Feral Bite inflicts have durations for Classic Mode.
    • It is possible to achieve these shorter durations in Journey Mode by changing the difficulty from Expert/Master Mode to Classic Mode after being inflicted with Feral Bite.
  • Internally, Feral Bite is named Rabies, a real disease which affects animals and humans.



  1. Information taken from the Desktop version Desktop source code, method UpdateBuffs() in Terraria.Player.cs. To be precise, there is a 1/1200 (0.08%) chance every tick for a debuff to be inflicted. This means that two or more debuffs can be inflicted very shortly after one another.