Burst Bolt

From your palm, a bolt of searing heat forms, before flying toward a target that you can see within range. Make a ranged spell attack. On a hit, the target is impaled by the bolt, taking 1d6 piercing damage. The bolt that is currently impaled in the target can be exploded with a bonus action, making the target take 2d10 fire damage. If the target is killed before the bolt is able to explode, the bolt is destroyed.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the piercing damage increases by 1d6 and the fire damage is increased by 1d10 for each slot level above 1st.