Burning Watchstrike

You call on the bond with your watch-blade, and generate a radiant wave of flame as either a cone or line up to the watcher's watch-strike range. The attack deals 2d6 radiant damage and 1d4 fire damage to all targets hit by the watch strike. Targets must make a dexterity saving throw, halving damage on a success.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the radiant damage increases by 1d6 for each slot level above 2nd.