Detest Magic

Upon casting this spell, you are filled with such overwhelming hatred for magic that you are able to simply ignore its effects. For the duration of this spell, any creature that attempts to target you with a spell must make a casting modifier check against your spell save DC. On a failed check, you are completely unaffected by the effects of that spell.

On a failed casting modifier check against this spell's effects, if a creature rolls a number lower than or equal to your proficiency bonus, the sheer force of your incredible hatred for magic deals 1d6 psychic damage to that creature. This damage increases by an additional 1d6 (for a total of 2d6) when you cast this spell at 7th level, and by an additional 2d6 (for a total of 3d6) when you cast this spell at 9th level.

When you are targeted with a spell, you can use your reaction cast this spell in order to force the creature casting that spell to make a casting modifier check against your spell save DC. On a failed check, you are completely unaffected by the effects of that spell. If you cast this spell in this way, you must immediately make a constitution saving throw in order to maintain concentration beyond the duration of your reaction. On a successful save, you maintain concentration on this spell as normal. On a failed save, you immediately lose concentration on this spell.

You can cast this spell at 7th level in order for it to also affect another creature of your choice (that you can see) within 60 feet of you in any direction.

You can cast this spell at 9th level in order for its effects to extend to all creatures of your choice within a 30 foot sphere centered on you.

You can use a bonus action to end the effects of this spell before its duration expires.