Abilities:

Valiona:

Ground:

• Blackout - Random debuff on player that absorbs 20K healing, when dispelled or expires, causes 250K shadow damage split among nearby players
• Devouring Flames - Targets a player's direction then engulfs half the room in front with 100K shadow damage, inflicts less damage the further away, 3 second cast

Air:

• Twilight Meteorite - Random debuff on player doing 120K shadow damage, split among all within 8 yards
• Deep Breath - Inflicts 15K shadow damage per second and sends target into Twilight Realm

Theralion:

Ground:

• Engulfing Magic - Random debuff which causes you to inflict shadow damage equal to the damage and healing you do, to allies within 10 yards for 20 seconds
• Fabulous Flames - Spits flames on ground doing 11K shadow damage per second

Air:

• Dazzling Destruction - Swirly void zones that do 500K shadow damage to all within
• Twilight Blast - Inflicts 20K shadow damage to enemies within 8 yards of target

Notes:

• Double Dragons, shared HP and threat, no resets, no cleaves, no tail lashes
• Alternates with each other one in air one on ground every 25%
• You see each phase twice.

Valiona Phase

• Starts with this one, stay spread out for Twilight Blast, random target aoe
• Stay close to boss run through for Devouring Flames (think Slime Spray but deadlier)
• Group up for Blackout, then dispel, absorb meteor explosion, then spread out again
• Dazzling Destruction are giant swirly void zones to not stand in, will kill on impact, or send you to Twilight Realm when touched

Theralion Phase

• Stack up tight, Twilight Meteorite will be the random aoe damage and it is a meteor
• Fabulous Flames create giant void zones to not stand in
• Engulfing Magic targets run the hell away from everyone to not kill us all
• Valiona will also occassionaly Deep Breath, just like Onyxia did
• There are 3 lanes she can set fire too with the breath
• If you survive being hit, sends you to the Twilight Realm

Twilight Realm

• In here, you're out of phase, but can attack boss and see everyone
• You gain a stacking DoT that attempts to kill you
• Adds all around that want to kill you
• Damage from the outside still can kill you
• Supposedly a portal will eventually appear to kill you, er, let you out
• Assuming you survive that long, otherwise, assume you're dead