Excalibur

You must wield your longsword in two hands when you cast this spell and it can only be cast by good creatures.

Make one attack with your longsword against a target within reach as part of casting this spell. This attack deals an additional 1d8 points of radiant damage.

Each creature other than your target in a 10ft line must make a constitution saving throw. A target takes 1d8 radiant damage on a failed save, or half as much damage on a successful one. The line must include your targets space.

Cantrip Upgrade. The damage increases by 1d8 radiant and the The spell's damage increases by 1d8 and the line extends an additional 5ft when you reach 5th level (2d8, 20ft), 11th level (3d8, 25ft), and 17th level (4d8, 30ft).