From PathfinderWiki
Alignment Lawful good
Race/Species Silver dragon
Homeland Citadel Cardekriel, Plane of Air
Deity Apsu

Source: Planes of Power, pg(s). 14

Pratinaxis is a ancient silver dragon who resides within Citadel Cardekriel on the Elemental Plane of Air. Pratinaxis serves as the commander of a knightly order of silver dragons who guard Citadel Cardekriel and the holy relics of the god Apsu that are kept within it. Pratinaxis and his draconic knights are kept under almost constant attack by an army of white dragons who seek a set of ancient artifacts known as the Shastiled that they believe are kept hidden within Citadel Cardekriel. This white dragon army is led by the ancient dragon Shelsikarsis who is always scheming to infiltrate the citadel despite Pratinaxis's best efforts to prevent this.[1]