The Divine Relics

In the episode Sasha's Rage she mentioned the relics and its importance to the humans and Shadow Knights but what is Aphmau's relic and where are the other relics but Irene's relic was found at the Irene Dimension could it be the other relics maybe in other Dimensions.

Such as:

Cerberus Staff

The Red Talasman

The Moonlight Ward

The Wyvern Lair Sword