Contagion
Spiritual (necromancy) 5th level
Casting Time: 1 action
Range: Touch
Components: V, S
Duration: 7 days
Your touch inflicts disease. Make a melee magic attack against a creature within range. On a hit, you afflict the creature with a Contagion disease (choose from Contagion – Mental Burning, Blindness Disease, Pernicious Fever, Flesh Necrosis, Sticky Ruin or Trembling).
At the end of each of the target's turns, it must make a Constitution saving throw. After failing three of these saving throws, the effects of the Disease extend for the duration of the spell, and the creature stops making such saving throws. After succeeding on three of these saving throws, the creature recovers from the Disease and the spell ends.
Because this spell induces a natural illness in its target, any effect that removes or mitigates the effects of a mundane Disease is applicable.