Combust

A target you touch suddenly bursts into flames. The target must succeed on a DEX saving throw or take 5d10 fire damage. 

On a successful save, this spell creates a small magical fire in the creature's space that lingers for 1 minute. A creature that enters the flames for the first time on its turn or ends turn there takes 2d6 fire damage. 

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.