The Shield has the appearance of a large light blue diamond with a red square in the middle. In the middle of the red square is the Imaginaughts symbol.
To start with, the shield regenerates the living tissue of its owner. However, due to its innefficent design, it drains a lot of Mana, even more than what an Aefian would normally use to naturally heal themself.
The brothers created this after the Grim Aider Revolution, to help with healing the Grim Aiders brought to the school. Unfortunately, the mana conversion properties were never sorted out, and the project was put on hold indefinitely.