Amulet of Ages

After the Chronosphere was shattered, several shards of the massive gem were collected and formed into the Amulet of Ages. This amulet eventually was acquired by the rulers of Tempest, who hid it away deep in the magical vaults of Steadfast.

Vrijeme holds the true Amulet of Ages, and he has any "Time Apprentices" head off to find shards to build their own. As they ruin timelines, they can shatter their AoA, and Vrijeme will show up, reclaim the shard(s), and then fix things, after imparting a lesson about being careful about mucking with time.

House DragonGuard shattered the Amulet that was once held in the vaults of Tempest, revealing that it was one built by a Time Apprentice and not the true Amulet as wielded by Vrijeme.