Anointed Oil

As with Holy Water, when you take the Attack action, you can replace one of your attacks with throwing a flask of Anointed Oil.  Target one creature you can see within 20 feet of yourself.  The target must succeed on a Dexterity saving throw (DC 8 plus your Dexterity modifier and Proficiency Bonus) or take 2d8 Radiant damage if it is a Fiend or an Undead.  Further, this Anointed Oil will cover the target in flammable oil... and if the target takes any fire damage before the oil dries (after 1 minute), the target will take an additional 5 fire damage from the burning oil.  You can also pour a flask of Anointed Oil on the ground to cover a 5-foot-square area, provided that the surface is level.  If lit, it burns for 2 rounds and deals 5 fire damage to any creature that enters the area or ends its turn in the area.  A creature can take this damage only once per turn.