The FFXIV 6.57 patch notes are here and detail the removal of weekly restrictions from the Pandæmonium: Anabaseios (Savage) encounter.

The weekly restriction on receiving Unsung Blades of Anabaseios from Anabaseios: The Twelfth Circle has also been removed, while the drop rate for the Lynx of Abyssal Grief Flute in the Abyssal ...