Caustic Staff

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Cosmic Plushie.png
Cosmic Plushie.png
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This item is dedicated to: Commander Frostbite
Caustic Staff
  • Caustic Staff.png
Stack digit 1.png
Damage15 Summon
Knockback2 (Very Weak)
Mana cost10
Use time25 Slow
TooltipSummons a mini dragon to fight for you
The dragon inflicts several debilitating debuffs
The debuffs are only applied if you are holding a summon weapon or tool
Grants BuffCaustic Dragon (buff)Caustic Dragon
Buff tooltipA mini jungle dragon is following you
RarityRarity Level: 4
Sell 2 Gold Coin.png 40 Silver Coin.png
Research1 required
Projectile created
Caustic Thorn
Caustic Thorn
Summons Minion
Caustic Dragon
Caustic Dragon.gif
Not to be confused with Caustic Croaker Staff, a Pre-Hardmode sentry-summoning weapon.

The Caustic Staff is a craftable Hardmode summon weapon. When used, it summons a black Caustic Dragon minion that flies behind the player and attacks nearby enemies by firing gravity-affected thorns that pass through tiles and pierce twice. While the player is holding a summon weapon or tool, the thorns will cycle through and inflict one of the following debuffs for 1-3 seconds in this repeating order:

Its best modifier is Ruthless. The Mythical modifier provides the widest array of stat bonuses, but these primarily affect the initial summon rather than the resulting minion. Additionally, minions cannot deal critical hits. The only lasting advantage a Mythical Caustic Staff has over a Ruthless one is knockback.




  • The debuffs inflicted from the thorns must time out and cannot be refreshed before the next debuff can be applied.


  • It is recommended to summon only one dragon as the attack rate of the dragon is fast enough to reapply the debuff alone.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • Now inflicts Hellfire instead of On Fire!.
    • Reworked, now inflicts debuffs on a randomized timer between 1 and 3 seconds.
      • Now only inflicts one debuff at a time, and cycles through its list of debuffs.
      • Debuffs are now only applied if the player is holding a Summon weapon or Tool.
      • Debuffs must time out and cannot be refreshed before the next debuff can be applied.
    • Fixed an exploit that allowed it to fire projectiles regardless of the player's available minion slots.