Future Cops
But back in the old days things like that were still science-fiction. and it looked exactly like that. like star wars or the fifth element... no, this was even beyond our wildest dreams! it was clear we had travelled in time.
The Risen Curtain - Chapter 16: The Interview - Magecraft & Magic
Of course, there are also some who have affinity with void, the fifth element, but those are rarer."
The Risen Curtain - Chapter 17: The Interview - The Mage's Association
"also, there are the chinese mages, who have thaumaturgical philosophies that do not fit the ones preached by the association, including the replacement of the four classic elements and the fifth element of void with their own five elements: earth
So Shall He Consume Me 5 - In Search of the Secret Spell
the first four were understandable, constantly changing various forms within a wondrously puzzling array of jars, but the fifth element was even more unusual.