Arcane Disruption

You create a magic glyph on the target to confuse thoughts and prevent casting. The target needs to make an Int saving throw. On a failed save it takes 1d6 psychic damage and  additional 1d4 psychic damage if it will cast any spell by the end of it's turn. If the target will not cast a spell until the end of its turn, damage effect is lost.

This spell’s damage increases by 1d6 and 1d4 respectively when you reach 5th level (2d6+2d4), 11th level (3d6+3d4), and 17th level (4d6+4d4)