I dont seem to get it, i got some summoning device and i had to fight some Eidolon, is there a chanec they will drop a key , or is it just some daily quest to get a elemental shard?
Also i think its the same thing you get when you collect 75 Eidolon energy crystals right?
So then if you collect 75 of those, you have A CHANCE, to get an Eidolon?
Also what do you do with the Ancient Eidolon fragments?
Yes, there's a chance to get a key fragment or the actual key.
as for energy crystals, they are used to summon a bigger and more powerful version of them, requiring usually around a fair amount of people to kill.
and the Ancient fragments, you can use these to craft a certain eidolon's key fragment. You need 30 for one frag, so you need 300 for the actual key.