The Thuban version of Avishraa was destroyed as a result of the actions of the Hzataalar Kaea in that continuity, and what remained was a series of shattered fragments floating in orbit around its sun. Miraculously enough, there appeared to be sufficient gravity and atmosphere for some life to cling stubbornly to existence on certain fragments, suggesting that while the planet was no longer physically in one piece, the fragments continued to be closely associated with each other.
Udunshraa remained intact on its own fragment, and the Hzataalar Kaea, although based offworld, kept an eye on it.
Beyond this, the features of this version of Avishraa remain unexplored, and indeed - for obvious reasons - rather moot, but it can be assumed that the world was once generally similar to its incarnation in the Amberworld continuity.