Hatchling Flesh
The article the Researcher Stena asked you to collected. Can be gained by defeating Dragon Hatchlings or Leopard Dragons that appear in the Dragon Valley area. Collect these and take them to the Researcher Stena at the entrance to Dragon Valley.
Not dropped by monsters.
Cannot be spoiled.
The chances are official (x1). On servers with x10, x100 and higher rates, drop and spoil come more often.