Disease: Divination Rot (Tier 3)
Some creatures have an aura of undeath, evil, or corruption so strong it influences even remote, magical attempts to see them. When a divination spell is used to remotely view, hear, or gather information about the creature (such as divination , legend lore , locate creature , and scrying ) the caster makes a spellcasting ability check (DC 17 + 2 per previous check in the last week). On a success, the spell works as normal, but the caster takes 24 (7d6) necrotic damage. On a failure, the caster instead catches a glimpse of a necromantic hellscape, takes 24 (7d6) necrotic damage, and suffers a level of strife . Regardless of the check’s result, the caster makes a DC 17 Constitution saving throw at the end of each of its turns. After three successes the caster resists divination rot, or after three failures it contracts the flesh-rotting disease and it lasts for 7 days.
A creature infected with divination rot has disadvantage on Charisma checks and becomes vulnerable to all damage. Spells or magical effects that remove disease cure divination rot.