Moonbeam

A silvery beam of pale light shines down in a 5-foot-radius, 40-foot-high cylinder centered on a point within range (120ft) for 1m.
When a creature enters the area for the first time on a turn or starts its turn there, it must make a Con throw. It takes 2d10 radiant damage on a fail, or half damage on a success. A shapeshifter instantly reverts. On each of your turns after you cast this spell, you can use an action to move the beam 60 feet in any direction.
At Higher Levels: +1d10 for each slot above 2n