Twintania Neurolink Key

Twintania Neurolink Key is a item that, when used, awards the Twintania mount.

Source
Twintania Neurolink Keys can be purchased for 15 from the following vendors:
 * Calamity Salvager - Old Gridania
 * Calamity Salvager - Limsa Lominsa Upper Decks
 * Calamity Salvager - Ul'dah - Steps of Thal