Armor (shield), uncommon
While holding this shield, you have a +1 bonus to AC. This bonus is in addition to the shield's normal bonus to AC.
A shield is made from wood or metal and is carried in one hand. Wielding a shield increases your Armor Class by 2. You can benefit from only one shield at a time.
Notes: Bonus: Armor Class, Combat, Warding
nice
Step 1: Be a warforged cleric of the forge
Step 2: Take a one-level dip into fighter to get the defense fighting style
Step 3: Use this in combination with your Blessing of the Forge and the shield master feat
Step 4: Have an AC of 22
Starting AC of 17 (Due to 16 because of chainmail and plus one due to integrated protection) plus 1 (Blessing of the Forge) plus 1 (Defense fighting style) plus 2 (Basic shield) plus 1 (Magic shield). 16+1+1+1+2+1=22
Also, if you can, get a +3 magic shield. It's a very rare magic item but It would bring your AC to 24
An extra large shield