Rust Bomb

Rust Bomb Level 5+ Uncommon On impact, this glass vial breaks, releasing a rusting agent that begins to deteriorate metal armor. Lvl 5, 50gp Alchemical Item: Volatile Formula Cost: 200 gp Key Skill: Arcana or Nature Time: 1 hour  Power  Consumable (Standard Action) 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.