The information here comes from a post made by the official account on Hoyolab made on June 25.

Note: All of the text on these cards was added to the in-game databank for 'Factions' in Lord Ravager (Destruction) in 3.4, which also contains additional explanation beyond what is presented here and has sometimes been rephrased.

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The prisoner is about to grasp the celestial flames, as cosmic fables echo from beyond the cave.

The fate of Amphoreus lies exposed before the gaze of Nanook and THEIR assembly of Lord Ravagers.

The displacement and desolation caused by the Lord Ravagers, enforcers of the will of Destruction, are not some distant wail, but are closely linked to the fate of the cosmos. Any world could be the next victim, and nobody should take them lightly.

“There is a coreflame in the center of the universe.
It burns brighter and brighter, until it consumes the sea of stars—
all to welcome a magnificent oblivion at the end of all realities.”

Embrace the Aesthetic of Destruction
Where all Things Return to Entropy

The Aeon Nanook, who walks the Path of Destruction, glances at the powerful creatures in different worlds that have developed the urge to destroy, and brands them with THEIR mark that gives power.

Lord Ravagers are both Aeonic Emanators and the enforcers of the will of Destruction: Obsessed with the beauty of havoc, adhering to the principle that all things return to entropy. They are also artists of war and the most refined weapons of Destruction: Commanding wars across the stars, wielding the devastating might blessed by the Aeon.^[1]

Each Lord Ravager has a unique philosophy of “Destruction,” making them extremely dangerous. Some claim they are “antimatter bullets” blessed by Nanook and purposed to incinerate Paths. If life feeds on negentropy, then all actions will ultimately facilitate Destruction. In the end, when all returns to entropy, Destruction will termiante together with the cosmos.