No need for any tests, Leon could clearly feel the tremendous change occurring within him as he achieved Dan Formation.
Despite having scales and wings, a dragon's body characteristics are more akin to those of feline animals rather than reptiles, and they move just like cats, elegantly so.
However, as dragons gradually grow, they become clumsier. Despite their graceful strides, turning and jumping become increasingly burdensome, akin to how a large ship struggles to make sharp turns. In terms of numbers, a baby dragon's agility remains the same as that of an Ancient Dragon, with no increase whatsoever.
Leon had always been troubled by this issue, often having to endure damage head-on because his body didn't allow him to perform intricate dodging maneuvers. At most, he could only tilt his head to dodge arrows, except when using the Gathering Form and Scattering Energy technique to show off.
