There is one Essence that is different from all of the others. It is a corrupted Essence, called Remnant of Corruption. These are only obtained by finding them in Essence mobs, and their purpose is to corrupt other Essence mobs that you find in the wild. When you come across a monster ...
There are chemical infusions by which the animal frame can be preserved forever from corruption; the bichloride of mercury is one. But, apart from decomposition, there may be, and very usually is, a generation of gas within the stomach, from the acetous fermentation of vegetable matter (or ...