Eggshilaration System Identification Key

Eggshilaration System Identification Key is a item that, when used, awards the Eggshilaration System mount.

Source
Eggshilaration System Identification Key can be obtained as a quest reward or purchased from the FFXIV Online Store.

Quests
Eggshilaration System Identification Key can be obtained as a reward from the following quest:
 * Eggsistential Crisis

Online Store
Eggshilaration System Identification Key can be purchased from the FFXIV Online Store for $12.