In Final Fantasy XIV, the final quest in the Myths of the Realm series has arrived. If you can complete the new 24-man content along the way, the third Alliance Raid, Thaleia, will conclude the story of Eorzea’s divinities. You shouldn’t have much trouble unlocking it, at least, since unlocking it is quite easy.
Where to Unlock the Thaleia Alliance Raid in FFXIV
The Heart of the Myth Side Quest unlocks Thaleia. It can be obtained from Deryk at Mor Dhona (X:23.9 Y:9.1). You will be able to unlock it once you’ve completed The Secret of the Twelve quest, obtained in the same questline you unlocked the Euphrosyne Alliance Raid. Upon arriving at the Deryk, you’ll know you’re at the right place if there are many people around.