Weld

 You create a small jet of flame out of your index finger.  The flame jet lasts up to one minute, as long as you concentrate.  You can use this jet to weld two pieces of non magical metal together.  In combat, as long as concentration is maintained, you can make a melee spell attack against the target. On a hit, the target takes 1d8 Fire damage. A flammable object hit by this spell starts burning if it isn’t being worn or carried.

Cantrip Upgrade. The damage increases by 1d8 when you reach levels 5 (2d8), 11 (3d8), and 17 (4d8).