Arthur's body changed, but he did not use his dragon transformation to its fullest. The second stage of that skill would make him unrecognizable, so for that reason, he opted only to use the first stage.
The number of attributes it increased was primarily reduced compared to the second stage, but at least it kept his secret.
A few cracks appeared all over his body; if one looked closely, they resembled dark scales similar to snakeskin.
Another thing that changed was his eyes, which kept changing colors, and his pupils were dragon-like.
"What is this? Transformation magic?" Serana thought.
The thought of an elf being a dragon never crossed her mind, so the only explanation Serana could find was some transformation magic, which was not uncommon.
Although it looked similar to transformation magic, the number of attributes Arthur's dragon transformation increased was in another realm.