Ember

You conjure a flickering ember in your hand and hurl it at a target within range. Make a ranged spell attack against the target. On a hit, the target takes 2d6 fire damage and becomes ignited, taking an additional 1d6 fire damage at the start of each of its turns until it takes an action to extinguish the flames. A creature can attempt to extinguish the flames by using its action to make a Dexterity saving throw against your spell save DC. On a successful save, the flames are extinguished.

At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.