Divine Spark

As a Magic action, point your shield at another creature you can see within 30 feet and focus divine energy at it. Roll 1d8 and add your Wisdom modifier. You either restore HP to the creature or force the creature to make a Constitution saving throw. On a failed save, the creature takes Necrotic or Radiant damage equal to that total half
on successful save.

You roll an additional d8 when you reach Cleric levels 7 (2d8), 13 (3d8), and 18 (4d8)