Avenging Bolt

You project a searing bolt of radiant energy at a target within range. On hit, the target takes 1d8 radiant damage. You can cast this cantrip as a reaction if an ally you can see is reduced to 0 hp, and if your target is the source of the damage that reduced your ally to 0 hp, you gain advantage on the attack roll.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).