"Although Giant Dragons are not social creatures, every adult Giant Dragon possesses power comparable to that of divinities. Dragon Blood is hard to come by..." Saina was educating them about the preciousness of Dragon Blood.
"Teacher Saina, must one slay a dragon to obtain Dragon Blood, or can one make a trade with a Giant Dragon?" Wayne couldn't help but interject.
"No."
Saina refuted Wayne's naïve idea, "A Giant Dragon can sense its own bloodline anywhere, naturally suppressing and making it impossible for the bloodline's possessor to defy the will of a Giant Dragon..."
"Moreover, as long as the dragon lives, the Dragon Blood will always be just that, unable to resonate and evolve the bearer's bloodline."
"A trade not only lacks value but also creates a hidden danger that cannot resist the source of the bloodline."
"..."x2
Both nodded repeatedly, acknowledging that as a superior lifeform, even a drop of blood came with many considerations.