When applied to a weapon, attacks made with that specific weapon are able to affect critical hits on creatures that are normally immune to critical hits (e.g., Constructs, Oozes, Plants, Undead, etc.) 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 creatures that are normally immune to being sneak attacked.
Oil takes one round to apply to a weapon.









