Mana is actually a generalisation of two different types of energy, Miasma and Essence. Miasma is the passive energy found in the environment and all living beings, whereas Essence is the energy used to create magical effects, whether by spells, abilities, or natural monster traits. [[Classes]] let you safely manipulate Essence, with the easiest ways of doing this being via [[Abilities]] and [[Spells]]. You can cast spells without a class, however, you would suffer from Essence being forcefully drawn out into the spell. Miasma is found in low levels in [[The Outside]], and in much higher quantities in [[The Tower]], increasing in density as you go up floors. Switching to a different Miasma causes a period of Miasma acclimation, with it generally taking an amount of days equal to the floors level. Switching to another Miasma density during this period causes [[Status|Miasma Poisoning]] for the time left on your acclimation. Doing this several times will have permanent consequences. ^9d58f1