Something about the new Ascian lore

[Zohar_Lahar]

Hydaelyn could represent an entirely different school of summoning that we haven't really seen anywhere else.

In Akademia Anyder, we see a similar small-scale summoning of "Guardian Force" Quetzacoatl, which may have been a prototype of how Hydaelyn might have been summoned much later. And we also saw one other primal summoned through summoner sacrifice: Shinryu (though others were also sacrificed in the process).