Moonbeam A5E

A beam of moonlight fills the area with dim light.

When a creature enters the area for the first time on a turn or begins its turn in the area, it is struck by silver flames and makes a Constitution saving throw, taking 2d10 radiant damage on a failed save, or half as much on a success.

Shapechangers have disadvantage on this saving throw. On a failed save, a shapechanger is forced to take its original form while within the spell's light.

On your turn, you may use an action to move the beam 60 feet in any direction.

The damage increases by 1d10 for each slot level above 2nd.