Bane Oil

This viscous, vibrant blue liquid swirls inside the vial when you move it. Affixed to the front is a wax seal bearing the symbol of the creature type it is intended to defeat. Around the neck is a length of red string so that it can be attached to the user's clothing for ease of transport and quick deployment.

Choose one creature type at the time of adding to inventory (aberration, beast, celestial, construct, dragon, elemental, fey, fiend, giant, magical humanoids, monstrosity, ooze, plant, or undead).

As a bonus action, you can apply this oil to a single weapon or a piece of ammunition. The weapon or ammunition now have +1 to hit creatures of the chosen type.

The creature of the chosen type must succeed on a DC15 Constitution Saving Throw or take 1d6 Force damage in addition to the base weapon damage or half as much additional damage on a success (rounded down). In addition, if the creature fails the Saving Throw, the DC increases to DC17 for the next minute.

After 1 hour following application or single use of the weapon (whichever happens first), the oil loses it's potency and the weapon returns to normal.

The vial only contains enough oil for a single weapon to be coated in the oil 5 times (or 5 pieces of ammunition).

The weapon is treated as a magical weapon while the oil has potency.

Note that the weapon is treated as a magical weapon due to it's anti-magic effects, but is not in itself magical. E.g. Detect Magic will not reveal this weapon as magical when the oil has been applied.

Notes: Damage, Buff, Consumable