Vermeil's Blue Flames

As you magically pressurize and spark the oil, a shock wave of flame explodes from you with such intense heat that the fire shines blue. Each creature in a 30ft cone area originating from you must make a Dexterity saving throw. On a failure, a creature takes 6d8 fire damage and is pushed 10ft away from you. On a successful save, the creature takes half as much damage and is not pushed.

The fire affects non-magical objects in the area that aren't being worn or carried. Those that are flammable ignite, and metal objects thinner than 3 inches (8cm) start glowing red hot.