With today's Aion maintenance and as part of the Aion Daeva Déjà Vu event, NCsoft has reduced the cooldown timers of all of its instances. One example given is Kromede's Trial, which has been reduced from 22 hours to just 4 hours during the event. This extends to all of the game's instances, so if you're looking to grind out some extra instances, now is a good time.
The event kicks off with today's maintenance and will continue through to the July 13th maintenance.
Source: Aion website
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