Acid Crystal Trap (A to Z Challenge – A)

1 April, 2013

Burning sharpOriginal created by the Matrix of Alchemy to defend her laboratories from thieves and spies, these defenses were pressed into service as impromptu weapons when the dragon attacked.  After her fall, their secret was discovered by House Arakshan who went on to use them extensively to protect their holdings.

Appearing as long and sharp white-green crystals, cloudy on poorly-made ones, nearly invisibly colored in superb ones, they are hung from decorations, inset in walls and doors, but at least half of the crystal must be exposed for it to function.  Stuck, they sound with a hissing whine rather than a chime and may fracture and burst in a spray of acidic fragments.

They are keyed to particular things, bloodlines, amulets, it varies, that will not trigger them.  Those that do not possess those traits are attacked by razor sharp crystalline shards that dissolve into acid.

Acid Crystal Trap (CR 3) XP 800

Type magic; Perception DC 27; Disable Device DC 27

Those who know a 1st level or higher spell with the acid descriptor or who have 3 or more ranks in Craft (alchemy) gain a +4 competence bonus on the Perception roll and +2 on the Disable Device check.


Trigger proximity (alarm / detect magic); Reset replacement of crystal

Effect spell effect (missile attack spell / acid arrow, Atk +9 ranged that ignores 1 point of armor, 1d6+1 piercing + 2d4 acid damage a round for 3 rounds)

Notes: Not very complex, but this is my first time using the Pathfinder trap form so this is a bit of a ‘practice trap’.  I wanted to fold some way to gain bonuses to notice and disarm the trap, what do people think of those?

Photo by Henrique Vicente and used under a Creative Commons Attribution 2.0 Generic license.



  1. Such a beautiful picture!

  2. Not only a cool trap, but “find the key” becomes an impetus to an adventure.

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