Dweomer Rupture

You disturb the weave around a creature you can see in reange, straining it to its breaking point. The target must make a Constitution saving throw. On a failed save, the creature takes 2d10 necrotic damage the next time it casts a spell before the end of your next turn.

This spell's damage increases by 2d10when you reach 5th level (4d10), 11th level (6d10), and 17th level (8d10).