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Message: <blockquote data-quote="Scharlata" data-source="post: 1661516" data-attributes="member: 4806">Hi!Even if this does not answer your question in the first place, this is the only entry on diseases (supernatural one like afflictions) in the latest Sage Advice.Kind regardsQ: How are save DCs for disease attacks calculated?Judging from the Monster Manual, disease DCs would seemto be based on Constitution. But that can’t be correct, canit? The higher the Constitution score the healthier themonster, right?A: When a monster has a disease special attack, the save DCfor that disease is 10 plus + 1/2 the creature’s Hit Dice plus thecreature’s Constitution modifier.As a general rule, any special attack that comes from theattacker’s body uses Constitution to determine the save DC. Inthe case of a mundane disease that functions as a special attack,healthier creatures carry a more virulent strain. For example,Table 8–2 in the Dungeon Master’s Guide lists a DC of 12 forfilth fever. Nevertheless, it requires only a DC 11 Fortitudesave to avoid contracting filth fever from a dire rat’s bite, whilean otyugh’s bite causes the same disease on a failed DC 14save.Special attacks that involve supernatural diseases often useConstitution to determine the save DC as well. In some casesthe creature or the disease might warrant using a differentability score. A mummy’s mummy rot, for example, usesCharisma instead of Constitution because undead creatures lackConstitution scores.When a character is exposed to a disease in some mannerother than a monster’s special attack, use the save DC listed onTable 8–2. For example, if a character steps on a rusty nail andis exposed to filth fever, the save DC is 12.</blockquote>

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