Devastate

You unleash a burst of energy at a point of your choice within range of the spell. Each creature in a 5-foot-radius sphere centered on that point must make a Constitution saving throw. On a failure, the creature takes 1d6 necrotic damage. In addition, you can spend 1 Mana point to create a second sphere within range using a bonus action.

This spell’s damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).