Apperance:

Think of Voldemort's face from Harry Potter. Looks pale, sickly, and a bit grim. Exactly like what a Miasmata's face would look like. However, to make it dissimilar to the Necromancer in terms of looks . . . I'm still thinking about that.
Attributes:
Immunity - Primary attribute. For each point in Immunity, the better chance the Miasmata has of resisting the gasses and viruses that can harm him or her, even the ones she create. Also under Immunity are skills that give the Miasmata and her allies Immunity from the dangers that spread on the battlefield for a short or long time.
Pestilence - The skills under Pestilence are where your miasmas and gasses are. Some effect a portion of the battlefield temporarily while others affect an entire zone for a certain amount of time. Some skills harm only enemies while others harm everyone, including your allies. It is important for a Miasmata to know what type of gasses to use at what times. You may cause an upset in your party is you choose a skill that harms everyone while everyone is terribly low on Health.
Viruses - The skills under Viruses are where your viruses and diseases are. It takes only one enemy to spread a disease all over the entire battlefield. It's similar to Pestilence, except it does not have immediately effects, as it requires time for the viruses and diseases to spread and grow in power. That is why most skills under Viruses are powerful, as it takes time to be effective. Once again, your allies are prone to some viruses and diseases, so be wise when using skills that harm everyone in the process.
Antidotes - The skills under Antidotes are where your cures for miasmas, gasses, viruses, and diseases are. Unlike Immunity, Antidotes are only used when your allies are already hurt by a skill under Pestilence or Viruses. Immunity prevents your allies from getting hurt by a skill under Pestilence or Viruses.
SKILLS AND WEAPONS POSTED LATER.