A Chest Of Tangible Memories  

See also: Tangible Memories

This is the Shard Chest. In each instance there will be a key holder. Kill it to get A Frostbitten Key. When you open the chest each member of the party will receive 1 Void Shard. This bonus can only be obtained if the level of the instance is 80. Mentoring down will prevent the key from dropping.

Miragul's Phylactery: Scion of Ice

The chest is in Arcane Collective. The key holder is a frozen thought in the same room.

Miragul's Phylactery: The Anathema

The chest is in The Sepulcher of Corruption at 157,3,-208 Copy . The key holder is ???.

Miragul's Phylactery: The Crucible

The chest is in ???. The key holder is a hidden tome in A Reflection of Silence.