Umb

Found in the rotten swamps of the City of Turtle Shell, Umbium is the name of a rare mineral found in abundance, in the depths of rotten swamps. The Umbium undergoes fractional distillation and produces a residue called Umb which is highly valuable due to its two main uses-

The upper layer of the residue, Umbik, is used to mint the currency of the empire. The fine silver line in the centre of the currency is made of Umb, which signifies the approval of the empire. The Umb within the currency marks its authenticity and signifies that the empire takes full responsibility of that currency and in any case of economic emergency. The currency can be exchanged for goods from the empire house of commerce.

When the upper layer is extracted from the mineral, the second layer is what makes Umbium most valuable. It was found by Sir Musez Penn of the Penn Bloodline around 100 years ago that Reapers suffer from discomfort in the presence of the smoke produced by distillation of Umbium. This theory was later revised by Sir Jeus “Iron Molder” Penn. After many experiments he was successful in making what we now call Umb bullets, often used in the weapon Kill Switch. This bullet is capable of reaping the Reaper themselves.