You pick a spot within range and ignite a spark at that location. The caster will then also select a spot within 20ft of the spark. At the beginning of your next turn, a 10ft radius pillar of wild fire that is up to 30ft tall appears at the location of the spark dealing 6d10 fire damage to all targets inside the area. The pillar of fire then moves to the 2nd location that is within 20ft and then dissipates. Any creatures that wasn't hit by the initial appearance of the pillar of wild fire but makes contact with the moving pillar must make a Dexterity saving throw. A target takes 6d6 fire damage on a failed save and half as much on a successful save.
The pillar of wild fire ignites flammable objects in the area that aren't being worn or carried.
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d10 for each slot level above 3rd for the initial pillar area and by 1d6 for each slot level above 3rd when the pillar moves into a target.
* - (A piece of flint)