Remnants :
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The lingering hints of the past universe , Remnants are anomalies that survived the White Purge

The white Purge was a event that split humans from the rest of the universe , explaining why in the Posse universe , there’s next to no aliens , no magic , etc

The white Purge the universe into 2 , the human universe , and another that houses everything else . The purge itself was done by a powerful mage who proved himself worthy to be the hand of justice to the being who truly created all of existence

Remnants are the faults of the White Purge , things that fit the criteria to be stripped away from but were not moved for unknown reasons

Remnants can be anything , a alien species , a magic spell , even an entire dimension