Tunic of butterflies
Hundreds of brightly colored butterflies cling to this armor, strangely undisturbed by the din of battle or other unpleasant conditions associated with the adventuring life. They sometimes flutter around the wearer. New butterflies sometimes crawl out of joints or gaps in the armor, although there are no chrysalises or hiding places on the inside. It’s just one of those things. You may send the butterflies off to protect an ally. That ally gains the magical protection of your armor instead of you (the bonus from your armor stacks with theirs). The butterflies return to you at the end of your next turn.