Corrupted Arcana

You have the innate ability to punish spellcasters and return their spells to them through a feedback loop.

After saving from a spell effect cast by a creature within 60 feet of you that you can see, you can use your reaction to have that creature make a Wisdom saving throw (DC 8 + your Proficiency + your Intelligence modifier).

On a failed save, the creature takes 3d8 psychic damage, and is stunned until the end of their next turn.

On a success, the creature takes half damage and resists the stun.

You can use this feature a number of times per long rest equal to your Intelligence modifier.