Plus 2 to base ac when attack either through or without armor. This is because of scales.

Darkvision

Spell that shoots up to ten scales from your body toward a target. These deal 1d4 bludgeoning damage each. This is considered a cantrips but doesn’t take a slot. Attacks made on where you removed your scales deal double the hit dice. These recover after three hours of being left alone. You can shoot an additional scale every 2 levels after one

You have trained yourself to be alert at all times, and to be able to fully take in your surroundings easily. This means you can detect specific conversations in a bustling street, determine whether the footsteps outside are those of a guard or a citizen, be able to discern the distant whispering of two people, and so on.