Poison Nova is the last poison-based skill the Necromancer will get. It is undoubtedly the best poison skill you can get as it can hit just about every enemy on screen and deals massive poison damage in a short amount of time.
History
This spell befouls the atmosphere surrounding the caster. With an arcane chant, the Necromancer corrupts the very air we breathe and causes it to erupt in all directions. It is from years of investigation and preparation that the Necromancer can choose a poisonous gas that is toxic to the minions of evil, yet harmless to himself and his companions.