The Chosen Ones

Basicaly, nobody knows, what Aero wants. Your ideas are already really powerful, so I wouldn't go any further. Zeemnan's Shiled you describe is a lot stronger then Life Stone or Tera Ring - and to get those items you need a Zozi, so you can have them really late in the game. This shield looks so strong, that I would put it in a Chapter 10 Lucky Box with at leats 30 luck necessery to get it.

The loop idea looks interesting though. It would be a nice accent in the campaign.