Contamination

In the Dread Domain there is a contamination haze all around Dorian's Castle. If they don't need to breathe they are immune. Certain creatures cause a point of Contamination and others cause a saving throw or they take a level of contamination.   Every time a creature gets a level of contamination roll a d6 and if that is equal to or less than the level of contamination of the creature they get a mutation roll a 1d20 to get it from Dungeons of Drakkenheim.   Levels of Contamination:

1. None
2. Hit points regained by expending hit dice halved
3. No hit points regained at the end of a long rest.
4. Damage dealt by weapon attacks and spells halved.
5. Incapacitated.
6. Monstrous Transformation

  If Theren gets 6 levels he turns into Arcane Wraith, Brandt turns into Warp Witch, Everan turns into Haze Wight.   To get rid of the Contamination levels they have to find someone who knows Purge Contamination - Which are Dean Karak, Everan, Father Mann,