A new legendary weapon has been added to the game with Ulduar: Val'anyr, Hammer of the Ancient Kings. This is a One-Hand Mace and even if the stats aren't known yet, it should only be available in a healer version.
The only stat known to this day is the On Equip effect:
* Val'anyr Hammer of Ancient Kings - Equip Effect - Your healing spells have a chance to cause Blessing of Ancient Kings for 15 seconds allowing your heals to shield the target absorbing damage equal to 15% of the amount healed. (This is only on Spellcast not HoTs)
The mace itself won't drop from any boss, players will be able to rebuild it through an Atiesh-like questline started by the Shattered Fragments of Val'anyr dropped by most of the bosses in Ulduar-25. You will need 30 Fragments to reforge the Hammer of Ancient Kings, just like the quest item you can drop Fragment of Val'anyr from most of the bosses in the 25-man version of the instance.
Reforging the Mace
This is done during the fight against Yogg-Saron (the final boss of the instance) through the Val'anyr Hammer of Ancient Kings quest. We can assume that Yogg-Saron uses Deafening Roar during a late stage of the fight.
Spell
Deafening Roar
Deals 7600 to 8400 physical damage and silences enemies for 4 sec. 2.3 sec cast
In the Maws of the Old God
Throw the fragments of Val'anyr into Yogg-Saron's maw while he's performing Deafening Roar. 20 yd range, Instant
Quests
There are two quests related to the Val'anyr, the first one is Ancient History started by the Shattered Fragments of Val'anyr, followed by Val'anyr, Hammer of Ancient Kings.
Ancient History
Bring the Shattered Fragments of Val'anyr to the Archivum Console in the Archivum in Ulduar.
Description
The pieces fit together to form an elegant hammer. Its construction appears to be at least partially Titan in nature. The console inside the Archivum might have some information regarding this artifact.
Val'anyr, Hammer of Ancient Kings
Throw the Shattered Pieces of Val'anyr into Yogg-Saron's maw while he's casting Deafening Roar and defeat Yogg-Saron and recover the Reforged Hammer of Ancient Kings.
This can only be completed in Heroic mode and only if at least one Ulduar Watcher is not assisting you.
Description
The Archivum Console has hinted at a possible way to rebind the fragments of Val'anyr: you must get the fragments inside the physical form of the being known as Yogg-Saron.
It sounds like a long shot, but for an artifact of such power you think the risk might just be worth it.
Feat of Strength
Description
Val'anyr, Hammer of Ancient Kings
Owner of Val'anyr, Hammer of Ancient Kings
Below is a picture of it, equipped on a pally.
