Dreggons' Sanctuary Key

 is a key.

Crafting
It can be made by ... from
 * 1 Piece of the Shell of Terrakubiack the Warrior
 * 1 Piece of the Shell of Aeroktor the Warrior
 * 1 White Dreggon egg
 * 1 Piece of the Shell of Ignilicrobur the Warrior
 * 1 Piece of the Shell of Aquabralak the Warrior