Williams arcane retort

to cast this spell you must have a creature concentrating on a spell or even some creature abilities (dm's discretion)

you spew forth magical arcane energy at a creature within 30ft of you that is concentrating on a spell against you they make a charisma save against your spell save dc or take 1d8 force damage and also the next spell atack they make is made with disadvantage within one round they do not gain disadvantage if they stop concentrating on the spell thou

At Higher Levels. This spell’s damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).