Welder's Arc

You place your index finger along places a Construct has been damaged, and begin to recite your spell. For the ten minute duration, you start to slowly mend their wounds with the magical sparks you create. A Construct you touch regains a number of hit points equal to 2d4 + 2. This spell only works on Constructs. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the healing increases by 1d4 for each slot level above 1st.