Read the Militarum Tempestus book the other day and caught the following regarding Craftworld Altansar. I have added the brief into the Craftworld Background Compilation
When the legendary Ordo Tempestus relics, the Barbed Gauntlets of Avitus, had been stolen by the Eldar from Craftworld Altansar, the Scions of the 55th Kappic Eagles were summoned to retrieve them. With vengeful purpose, the Eagles smashed through wave upon wave of Guardians in order to reclaim them.
|Astra Militarum vs Altansar|
Who knew the recent battle with Abby could have been the re-enactment of the retrieval of the Gauntlets!