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During the Fall of Torobatl to the Hive God of War Xivu Arath's horde, Tha'arec gathered with the rest of Caiatl's advisors aboard her flagship Eligos Lex V's war room to discuss strategy. Tha'arec lamented that their best generals had been taken by Dominus Ghaul on his crusade to the Sol System, but their fellow advisor Ca'aurg angrily noted none of the Legion would return and declared that the fall of their Empire had not begun with Ghaul's reign but under Emperor Calus. Tensions rose in the room as Tha'arec and Ca'aurg stared each other down, but Caiatl interrupted their dispute before violence began to denounce both her predecessors and declared herself as the new Empress, with her first order being a tactical withdrawal from their homeworld to regroup and save what civilians they could.
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