Quote Originally Posted by QT_Melon View Post
No it's also mentioned in Tales from the Calamity.

https://www.finalfantasyxiv.com/anni...?rgn=na&lng=en
Should Eorzea’s patron deities assume physical form, it seemed more than likely that they would be prone to the same appetites as the gods of the beastmen.
Nowhere does it state that the Twelve drain lands unsummoned. And there is no hint whatsoever that they were ever fully summoned.