Blight tonic increases the potency of a creature's disease attack transmitted by physical contact, such as a dire rat's filth fever. The next time a creature must save against the drinker's disease save DC, the DC for the initial infection increases by +2. The tonic lasts for 10 minutes or until the next time a creature must save against the drinker's disease DC, whichever comes first.
- Advanced Race Guide
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