User blog comment:KnocknickKnock/9 gates + master of the celestial realm/@comment-2.83.198.8-20131212210042/@comment-24264679-20131214210037

Nonickneeded silver keys are common and was stated to have multiple ones. Even with that being said do you really think there would be 2 celestial spirit kings, or 2 dracos or etc because then celestial spirit magic would just be 2 OP. 1 mage could basically control 2 celestial spirit king keys and dominate the whole celestial realm never to be opposed hell they could practically dominate all of earthland.

Fairytailgrandmaster The spirit king does have a key when he was holding a meeting with the celestial spirit he kind of confirmed he has a key but I doubt anyone has had it for a long time if ever since I would assume it would take one hell of an amount of magical power to summon the king. All 12 zodiac keys haven't even ever been in 1 mages hand and summoning 7 spirits is incredible and impossible in Leo's eyes which is a spirit that has been around for a long time.