Sweet Harmony

You create a soothing melody to heal up to three creatures of your choice within sight. Each target rolls a d4 and adds their constitution modifier. Heal this many hitpoints. If cast as cantrip/level 1, this spell does not require a spel slot. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can roll one additional d4 for each slot level above 1st (2nd spell slot 2d4, 3rd spell slot 3d4...).