Dominarian Nexus
Dominarian Nexus is a system of twelve planes. It was created soon after the Brothers' War and Sylex Blast. Amount of energy released from Dominaria residing in the center of Dominia created the Shard and crystalized the planes inside into stable system. Eleven planes, including Azoria and possibly Nether Void, started to orbit Dominaria and lasted in this state even after destruction of the Shard itself.