Though powerful and as strong as the ancient scales of dragons long lost to the annals of time. The Stone Plate Armor is notoriously heavy. The Knight in question had to train since he was but a boy in order to someday. possibly. wield it.
How he came into possession of such a powerful vestige, is a story for another time. What matters now is that he is trapped in an appearance of his own making. Finding this figure quite cumbersome rather than exuberant.
For sometimes the armor we seek is not only claimed. But is grown into. Which is often times more perilous than the adventure.