Shield of the Protector

''These dumb kids... no respect for their elders, no respect for the wisdom of those who came and fell before them to keep them safe. These moronic children had the nerve to laugh in MY face. I didn't lose four teeth, three fingers, two toes, and one eye to several various hordes of meat eating marauders, most of which weren't even human, to protect this godsdamned village so disrespectful whelps like them could have a godsdamned future free from the fear that kept his father down for so long. Well who's laughing now that you've come to save their ungrateful asses from... oh... that's a dragon... oh. Here we go again.''

Armor, shield, requires attunement
Once per round when an ally within 30ft is the subject of an attack, you may teleport to a space adjacent to them closest to the origin of the attack. If you do, you may impose disadvantage on the attack roll. If it misses, you take half the damage it would have dealt. You may do this additional times per round as a reaction.

When you have taken damage protecting an ally using this shield, you gain an additional +2 AC for one minute. You cannot benefit from this ability again until that minute is over.