Campaign: Dungeons of Drakkenheim
Researching the Spell: A character who can cast 7th level spells, knows the Neutralizing Field spell, and who has visited the Delerium Heart can research Contamination Immunity. To complete the research, the caster must spend 35 days of downtime and 1750 gp.

Until the spell ends, one willing creature you touch is immune to necrotic damage and cannot gain contamination levels. The affected creature may rest normally within the Haze.
  This spell ends immediately if the creature casts a contaminated spell.