Quote Originally Posted by Alenore View Post
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It is stated in game that they have no idea why Odin is able to summon HIMSELF, proof that he doesn't need worshipers, while it is true that his wrath and sorrow might be you're typical reason as why he is able to do so, I like to think he just can summon himself without any cliched motive, i might be wrong but nothing proved otherwise so i'll stick with that belief.

the difference is that Garuda's existence was known before the seal was broken, but Bahamut had been long forgotten (can't recall where i got this but i'm pretty sure i red somewhere that it is only after reading some really old archives that they discovered bahamut's identity.)
If the dravanian had kept worshiping a god that is probably lost for good, people would know, just like they know about the ixals for garuda.

Quote Originally Posted by Magis View Post
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I don't really get why they'd need to lock bahamut away if they had to summon him, because it means that he wasn't here, so there would be no need to seal him.
maybe the prayer was to lure him in, not summon him

(All of these are theories, not 100% sure statements, just my interpretations, i might be completely wrong)