Slash through enemies with two leaves of the exceedingly rare Arum Spinosa plant. Heavy Attack to whip a flurry of toxic spines at ranged attackers.

Arum Spinosa is an Infestation b.svgInfested Warfan that shoots Toxin b.png Toxin projectiles on Heavy Attack.

Characteristics[edit | edit source]

This weapon primarily deals Slash b.svg Slash damage.


  • Highest base damage of all warfans.
  • Highest status chance of all warfans.
  • Above average attack speed.
  • The first Heavy Attack throws 12 projectiles with a base damage of 175 per projectile, the second heavy attack in sequence will throw 6 projectiles with a base damage of 350 per projectile. Both totaling 2100 damage. 
    • Projectiles base damage is 12.5% Impact b.svg Impact, 18.75% Puncture b.svg Puncture, 31.25% Slash b.svg Slash, and 43.75% Toxin b.png Toxin. The damage of the projectiles is affected by mods.
    • Projectiles are considered a heavy attack. Their damage will scale from the combo counter and mods such as Mod TT 20px.pngKilling Blow.
    • Projectiles have innate Punch Through.
    • Projectile damage does not diminish with distance.
  • Innate Madurai Pol.svg and Naramon Pol.svg polarities.



The Arum Spinosa's blueprint and components can be acquired from Lvl 40-50 Arcana Isolation Vault Bounties. The blueprint and all components can be traded.

Drop Chance Expected Nearly Guaranteed
Main Blueprint
(Stage 1, lvl 30-40)
18% 8 – 9 Bounties 36 ± 11 Bounties
(Stage 2, Stage 3, lvl 40-50)
(Stage 4, lvl 40-50)
(Stage 5, lvl 40-50)
(Stage 4, lvl 40-50)
(Stage 5, lvl 40-50)

Expected refers to total number of attempts a player can expect to need in order to receive at least one of each drop associated with the respective values.

Nearly Guaranteed refers to the total number of attempts a player needs to obtain a 99%, 99.9%, and 99.99% probability to receive at least one of each drop associated with the respective values.

For more detailed definitions and information on how these number were obtained, visit here.

Manufacturing Requirements
Time: 12 hrs
Rush: Platinum64.png 35
MarketIcon.png Market Price: Platinum64.png N/A Blueprint2.svg Blueprints Price:N/A

Notes[edit | edit source]

Trivia[edit | edit source]

  • The name of the weapon may have come from the English word "Arum", and Italian word "Spinoso".
    • The arum is a flowering plant seen in Europe, northern Africa, and western and central Asia.
    • "Spinoso", in Italian, means "Prickly", or "Thorny".

Media[edit | edit source]

Patch History[edit | edit source]

Hotfix 29.6.2

  • Fixed issues with colour customizations not saving on the Arum Spinosa projectiles.

Hotfix 29.5.9

Sporothrix and Arum Spinosa Blueprints are now tradable!

To balance out the Weapon Blueprint drop % reduction we’ve made the Sporothrix and Arum Spinosa Blueprints tradable. The Sporothrix and Arum Spinosa parts were already Tradable, but it’s now one step further.

Hotfix 29.5.3

  • Fixed the actual base Blueprint for the new Arum Spinosa not being in Rotation A of Deimos: Arcana Bounties. Arum Spinosa Blueprint is now in Rotation A at 18%.

Update 29.5

  • Introduced.
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