Keen OilLevel 10 Uncommon

The sword sweeps through your enemy, cutting through its armor and flesh in one deadly arc.

Lvl 10200 gp

Alchemical Item: OilFormula Cost: 600 gp
Key Skill: Arcana or ThieveryTime: 1 hour

Power Consumable (Minor Action)

Apply keen oil to an axe, a heavy blade, a light blade, a polearm, or a spear. Until the end of your next turn, you can score a critical hit with this weapon on a roll of 19-20.

Published in Eberron Player's Guide, page(s) 101.