Aeon Disk

This small circular kite shield is made from polished maple wood with a wrought iron frame. A large circular-cut aquamarine rests socketed in the center that appears to be flowing with life within.

This kite shield does not act as a normal shield nor does it offer a bonus to AC. It is worn on a belt or slung in a similar fashion. When the bearer takes at least 1/4th their max health in damage from the attacks in a single creature's turn, the bearer can use their reaction to become immune to all damage until the start of their next turn. However, once this is activated, the bearer cannot cause damage for the duration of their next turn.  Once used, the Disk cannot be used again until the next dawn.