Eminent Ward

A barrier of faint blue energy appears and protects you. Until the start of your next turn, whenever you are affected by a spell that requires you to make a strength, dexterity, or constitution saving throw, it instead registers as a normal attack, dealing half damage on a hit. The spell rolls to hit with a bonus equals to the original DC - 10. While this spell is active, your AC against spells affected by the shield increases by 5.

The shield automatically breaks upon resisting a total of 100 damage.