Quote Originally Posted by MrThinker View Post
As far as 'special ineraction' with Bahamut and Phoenix goes... the Dreadwyrm trance is explained to be possible due to all of Eorzea being doused in his aether in the Calamity, and we are just learning how to 'attune' to that aether. Firebird trance can be a similar thing, due to Phoenix being present at the same time as Bahamut. As for the actual summoning of Demi's.... the only nuggets we get about that is that Prin teaches us an 'advanced summoning technique' before it enters hibernation and that 'Demi-x' enemies appear during the instance we fight on Seal Rock. I was hoping that the Encyclopaedia Eorzea Volume II would have had a bit more context to add regarding Demi summoning, but I don't have it, and none of the people who do have said anything about it.
The second volume doesn't go into it at all, the part for Jobs is mostly about the weapons and armors. We might see more in Volume III but who knows.