Divine Call

You invoke the name of the god whose favor you possess. If you are Iconoclast or do not have sufficient favor with the named deity (at least a Piety score of +5), the spell fails and you expend the spell slot. If the spell succeeds, you gain the following ability for the duration:  when you land an attack or spell attack for the first time on your turn, roll 1d4. 

• On a 1, you deal additional damage equal to your Piety score divided by 5, rounded down.
• On a 2, you heal a number of hit points equal to your Piety score divided by 5, rounded down.
• On a 3, the target has disadvantage on the next attack they make.
• On a 4, you have advantage on the next attack you make.