MAX Stack x 1
A blade that weighs nothing
Even as he struck, the apparition vanished, and his blade clashed deafeningly on the adamantine surface. Instantly he sensed something abnormal. The blade stuck to the table! He wrenched at it savagely. It did not give. This was no mesmeristic trick. The table was a giant magnet. - Shadows in Zamboula
In Zamboula, at the shrine of Hanuman, there is a table that attracts metal objects. The faithful consider it a divine object, and they claim that anything that touches it inherits a part of the divinity temporarily.
This blade is made of the same material as that table and, though it is hard to explain, this blade weighs nothing. It seems to repel the very ground itself and push upwards, against the hands of the bearer.
In doing so, it lightens the load of any who carry it, freeing them to focus on their other possessions.