The unique property of Quintessence of an Essence means it can be merged with that of another in The Pattern. Usually, one Presence is subsumed by the merger, and it imprints its powers, outlook, tenets, and credo upon the other. They cannot have conflicting Codes of Conduct without some collision of wills. There may be an issue with the Memories if the process or combining or merging goes wrong or is flawed or incomplete.