Oil of the Tinkerer

When applied to a weapon, attacks made with that specific weapon are able to affect critical hits on Constructs. If the wielder of the coated weapon is a rogue, attacks made with that specific weapon can be used to perform a sneak attack on a Construct. (Constructs have no “vital” areas and are normally immune to critical hits and sneak attack bonuses.) This oil does not enable the coated weapon to crit/sneak attack any other creature type that is normally immune to crits/sneak attacks.

This oil takes one round to apply to a weapon. Once applied, the effect lasts for the entire combat.

A polymorphed character can only benefit from a weapon oil if the oil was applied to their weapon prior to transformation. Monks cannot apply a weapon oil to their bare hands but can apply a weapon oil to a physical weapon they wield.

A single weapon may be coated with more than one oil at a time, but unless otherwise specified, each oil takes one round to apply. Multiple coatings of the same oil do not increase that oil’s effectiveness.