Discus

You fling a ring of light in a straight line centered on you, cutting a path out to 30 feet long and 5 feet wide, where it then hovers. You may choose to stop the ring before it reaches 30. Each creature in the path of the ring must make a Dexterity saving throw, taking 1d8 radiant damage on a failed save, or none on a successful save. When you end your turn, the ring returns to you, and any creature in a straight line between the ring and you must repeat the saving throw.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st. Add an extra ring that can go in a different direction for each odd spell level above first (3rd, 5th, 7th, 9th).