130 gp per flask (enough for 1 application)
Magic Item, Uncommon, homebrew
A glimmering, translucent oil that gives off a very faint white glow.
As an action, you can coat a weapon with this oil. For the next 3 attacks that hit, a fiend or undead that is hit by this weapon does not have resistance or immunity to the weapon’s damage.
The oil spoils and loses its potency quickly after being applied. The effect dissipates completely 1 minute after application.
A cleric of paladin may create Sanctum Oil by performing a special ritual. The ritual takes 1 hour to perform, uses 130 gp worth of powdered silver, and requires the caster to expend a 2nd-level spell slot.