@JeremyECrawford While you were on vacation something curious came up. Lizardfolk natural AC implies you can use it while wearing armor. The +1AC bonus from magic armor says it applies to you while wearing the armor. So Lizardfolk with 13+Dex+1 AC if they are wearing +1 Leather?
— Dave Williams (@DaveWil33) July 18, 2018
The AC bonus that magic armor confers to you while you wear it is a property of the armor. That bonus doesn't apply to other AC calculations you might have. #DnD https://t.co/GzT5xuvOuX
— Jeremy Crawford (@JeremyECrawford) July 18, 2018
If a DM wants the AC bonus conferred by magic armor to apply to the natural armor of lizardfolk, nothing in the game will break. And that DM is making a reasonable call based on the wording of the armor's description. I shared our intent, but the DM decides. #DnD
— Jeremy Crawford (@JeremyECrawford) July 18, 2018