Diamond Shield "Adamas Gear"

The huge shield of the Demon knight Thetis, who is renown for saving his companions many times thanks to his "Wall of Steel". This incredibly solid shield was made by his ancestor who founded his family's armor shop. They say it would not be scratched even by a Dragon's attack. However, because of its weight, it was stored away for a long time and only thanks to his tireless training, Thetis mastered the technique to handle it.