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Desktop/Console/Mobile-Only Content: This information applies only to the Desktop, Console, and Mobile versions of Terraria.
BetsyHardmode exclusive
Animated Betsy.gif
Map Icon Betsy.png
Map Icon
Classic mode icon.png Classic
Expert mode icon.png Expert
Master mode icon.png Master
AI TypeBetsy AI
Damage80/104/156 (contact)
70140210 (Betsy's Fireball)
70140210 (Betsy's Breath) [1]
Max Life50000/75000/95625
KB Resist100%
Immune toOn Fire!ConfusedHellfireShimmering
Inflicts debuff
Inflicts debuff
Inflicts debuff
DebuffOn Fire!On Fire!
Debuff tooltipSlowly losing life
Chance100% (Betsy's Breath)
Duration7–10 seconds14–20 seconds17.5-25 seconds [2]
Projectiles created
Projectiles created
Projectiles created
  • Betsy's Fireball
    Betsy's Fireball
  • Betsy's Breath
    Betsy's Breath
For the Betsy-themed pet, see Itsy Betsy.

Betsy is a Hardmode, post-Golem mini-boss that spawns once during the seventh and final wave of Tier 3 of the Old One's Army event. Like all enemies in the Old One's Army, she will despawn upon completion or failure of the event. Defeating Betsy is the only way to complete the final wave of the event successfully.


Upon being summoned, Betsy cycles through the following attacks in the following order. If within close enough proximity to the player, she will target them instead of the Eternia Crystal.

  • Betsy lunges at the target twice in succession.
  • Betsy positions herself to the left or right of her target before flying horizontally in a straight line. During this time, she spews a fiery stream of Betsy's Breath from her mouth downward, damaging the target and inflicting the player with the On Fire! debuff for 7–10 / 14–20 / 17.5–25 seconds.
  • Then, Betsy lunges at the target once.
  • Betsy flies forward a short distance while launching six small Betsy's Fireballs that are affected by gravity, exploding upon contact with the player, the Eternia Crystal, or solid blocks.
  • Betsy then flies around in a large loop, similar to Duke Fishron's Detonating Bubble attack during his second phase.
  • Afterwards, Betsy performs her fire breath attack again.
  • Finally, Betsy hovers in place and roars, spawning three Tier 3 Etherian Wyverns that appear around her, while also spawning an additional three from both Mysterious Portals.
    • This attack will not summon Etherian Wyverns if there are already at least five Etherian Wyverns currently existing in the world.[1]


  • Regardless of the world's current point of progression, Betsy always spawns Tier 3 Etherian Wyverns, which can be seen if she is spawned via mods or other external programs.
  • Betsy can only spawn a maximum of six Etherian Wyverns from Mysterious Portals. The cap is shared between all Mysterious Portals if more than two are summoned with the use of mods.
  • Betsy's attack pattern may randomly skip some of her attacks depending on the player's attacks or movements. However, the first four attacks and the final summoning attack are always performed consistently.


Achievement Hero of Etheria.png
Hero of Etheria • Repel the strongest forces the Old One's Army can muster.
Defeat the highest tier of the Old One's Army event. (Desktop, Console and Mobile versions)
Category: Slayer Slayer


For more elaborate strategies on defeating Betsy, including weapon and arena recommendations, see Guide:Old One's Army strategies.
  • The On Fire! debuff is a major source of damage. Note that it negates life regen from Nebula armor's set bonus – hence, if the player is unable to avoid Betsy's flame breath attack, it might make the armor ineffective.
    • The Obsidian Skin Potion can prevent the debuff.
    • A floating pool of water (utilizing Bubbles) can be used to cancel the On Fire! debuff. Honey will also cancel the debuff and also give extra life regeneration, but slows down movement while submerged in it.
    • This does not apply to life-stealing effects such as the Spectre armor Hood set bonus or the Vampire Knives. It does not affect the Life Drain's health regen boost either.


Betsy in DD2.
  • The BestiaryBestiary entry for Betsy: "A vicious Etherian dragon who leads the minions of the Old One's Army that found their way to this world."


See also

  • Betsy at the Dungeon Defenders 2 Wiki


  • Desktop
    • Fixed a bug where Betsy's loot had half the correct drop chance.
    • Now correctly fills out its Bestiary entry completely upon its first defeat, like other main bosses. This fix was not done on the Dark Mage and Ogre.


  1. 1.0 1.1 Information taken from the Desktop version Desktop source code, method AI_110_Betsy() in Terraria.NPC.cs.
  2. Information taken from the Desktop version Desktop source code, method StatusPlayer() in Terraria.Projectile.cs. There may be inaccuracies, as the current Desktop version Desktop version is
  3. Information taken from the Desktop version Desktop source code, method RegisterBoss_Betsy() in Terraria.GameContent.ItemDropRules.ItemDropDatabase.cs. There may be inaccuracies, as the current Desktop version Desktop version is