Alchemist's Fire

This sticky, adhesive fluid ignites when exposed to air. 

As an action, you can throw this flask up to 20 feet, shattering it on impact in a 5 foot radius. Make a ranged attack against a creature or object, treating the alchemist's fire as an improvised weapon. On a hit, the target takes [roll]1d4[/roll] fire damage at the start of each of its turns while it remains in the affected area. 

A creature can end this damage by using its action to make a DC 10 Dexterity check to extinguish the flames. 

Notes: Utility