School necromancy [disease]; Level blue 7

This spell functions as monstrous disease I, except that the monster whose disease you're recreating must be CR 15 or lower. If your target fails its initial save against the disease, the disease cannot be resisted normally; no number of successful saves stops the disease from running its course (though each successful save otherwise functions normally). The only way to cure the disease prematurely is to use remove disease or a similar effect.

The DC to remove the disease with magic is equal to the save DC + 5.