Satyrn
First Post
I'd also careful about that. Compare to the 1st-level shield of faith spell (bonus action, +2 AC, concentration).
It also potentially boosts the AC up to 21 just with Proficiency and Dex, which is better than any armor, and is well ahead of the AC calculation that dragon sorcerers get. I wouldn't be doing this, either.
@Yunru, why are you looking to make a shield cantrip, anyway?