Cauterizing Bolt

You conjure a small burst of alchemical flame and hurl it at a creature or an object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d8 Fire damage and any creature hit can't regain hit points until the start of your next turn. A flammable object hit by this spell starts burning if it isn’t being worn or carried.

Cantrip Upgrade. The damage increases by 1d8 when you reach levels 5 (2d8), 11 (3d8), and 17 (4d8).