Rust BombLevel 5+ Uncommon
On impact, this glass vial breaks, releasing a rusting agent that begins to deteriorate metal armor.
Lvl 5, 50gp
Alchemical Item: VolatileFormula Cost: 200 gp
Key Skill: Arcana or NatureTime: 1 hour
Make an attack: Ranged 5/10; +8 vs. Reflex; on a hit, a target wearing metal armor or that has a metallic body takes a -1 penalty to AC until the end of the encounter.
Published in Dragon Magazine 376, page(s) 29.