The Multicoin was created by Albenexter, a very cheap but clever wizard who loved
visit far away places for extended periods of time. He would pass through
various countries and provinces, and always get upset by the rediculous
exchange rates moneylenders requested. So he came up with his own solution.
The result was the Multicoin.
Essentially, the Multicoin is nothing more than a thin piece of cheap
copper, but it's true form is never revealed. As a skilled Illusionist,
Albenexter permentantly enfused his Multicoins with the power to take on any
form of currency stacked on top of it. This way, he could travel from area to
area, and only exchange for one coin, which would then be replicated by all his
other coins.
Unfortunatly for Albenexter, his scheme was uncovered when he passed a
large number of his coins to a moneylender who accedentally added them to a
pile of different currency, and noticed the sudden change. Abenexter was never
cault, so there is no way of knowing how many of his coins are floating around.