Starting on 9/28, Aion Classic players will receive 2 free hour of Siel's Aura every day. This will start as soon as you log in and will only count down while you are still logged into the game. This free 2 hour is tied to your account and not your character(s). The free hour of Siel's Aura will reset at 9AM daily server time. More info on the revamped Siel's Aura here.
[Aion Classic] Daily Siel's Aura Free Trial
