I want to make an build based around Poison but...
>Draugur
>Undead
>Vampires
>Dwemer
>Spheres
>Centruions
>Ash Spawns
>Deadra
>Harkon
>Miraak
>Ebony Warrior
>Karstaag
All immune to Poison btw... That's like 80% of the enemies you slay in this game. Only Humans, Dragons and Giants are weak to Poison damage....