by Cyrak on Jan 13, 2011
Valiona and Theralion are twin twilight dragons dwelling in the Bastion of Twilight, World of Warcraft: Cataclysm's beginning raid instance.
Since they alternate, Valionas ground phase is Theralions air phase and vice versa. This means that you have to deal with the ground abilities of one of them at the same time as the other ones air phase abilities.