Fell Leprosy

Curse. Fell Leprosy is an affliction of undeath, when an infected creature dies the creature is reanimated as an undead zombie after 1 minute. 

Hidden. Fell Leprosy cannot be targeted by attacks or harmful actions unless they specifically deal with diseases. If a harmful action is attempted, the infected host suffers any effects instead.

Infect Host. When a living creature comes into physical contact with an infected creature Fell Leprosy can attempt to infect the new creature. The creature must make a Constitution saving throw DC 15, becoming infected on a failure. The creature then suffers symptoms described in the Pathogen feature. Fell Leprosy can only infect a new creature once its host is suffering from stage 5 symptoms.

Pathogen. Fell Leprosy is a disease, it can only infect living creatures. Once infected a creature will suffer the following symptoms after failing the stated number of Constitution saving throws:

An Infected creature must make a Constitution saving throw after exerting their bodies, including but not limited to:

• Regaining hit points via hit dice.
• Stabilising whilst unconscious.
• After gaining a level of exhaustion.

Curing the Disease. Fell Leprosy can only be cured with a Restoration spell or applying an ointment made from the ground wings of a fairy or the sap of a tree grown in hallowed ground or holy water.