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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)
Use time24 Fast
TooltipSummons a mini dragon to fight for you
The dragon can inflict several debilitating debuffs if you hold 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
Projectile created
Caustic Thorn
Caustic Thorn
Summons Minion
Caustic Dragon
Caustic Dragon.png
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 pierce through tiles and up to two enemies. 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.



Crafting Station
Demon AltarDemon Altar
Crimson AltarCrimson Altar
Any Evil FlaskAny Evil Flask5
Soul of NightSoul of Night10
Any Evil BarAny Evil Bar10
Caustic StaffCaustic Staff1


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