Sacred Key?

[Drakossozh]

What is the use of the Scared Keys? I hear its part of some weird alchemic recipe... Can anyone give me some examples? D:

[Brain Akazariua]

It's used in the Inizio Quest chains which give you backwings.

[Mispriced xD]

Drakossozh

Used in Quest Formulas.

[Xel Tassadar]

I was wondering what those were for, thanks for the insight guys.

[Gataki Vargas]

But... What on Gaia is a Quest Formula??? So confused... I have two keys and no idea of their use...