Alchemist's Fire

This sticky, adhesive fluid ignites when epxosed to air. As an action, you can throw this flask up to 20 ft., shattering it on impact. Make a ranged Attack against a creature or object, treating the alchemist's fire as an improvised weapon. On a hit, the target takes 1d4 fire damage at the start of each of its turns. A creature can end this damage by using its action to make a DC 10 Dexterity check to extinguish the flames. Required Proficiency (bonus): Alchemist's Supplies (+2) Ingredients: Fire Elemental Ember, 1 vial of oil