Quartz
Hero
Until the start of your next turn, you have a bonus to AC equal to your proficiency modifier. This includes the triggering attack. You also take no damage from Magic Missile.
Not only no, but hell no. Imagine a high level PC with Plate +3, Shield +3 and +6 to AC from this via Magic Initiate. That's AC 32. Or a 20th level Barbarian with Dex 20 and Con 24 and a Shield +3 for AC 32 also.
Then it's better than the first-level spell as well.