Dragonhide

Dragonhide is basically the skin of a dragon.

Description
Dragonhide is an extremely rare item that could not be obtained except from killing a dragon.

Abilities
A scroll made with materials of the highest tier, like dragonhide, could contain even 10th tier magic.

Trivia

 * All the members of Ainz Ooal Gown used to hunt dragons together back in the past to obtain their hides for construction materials.