Ideas for my Pathology patch

[Frank_Stein]

Phantom limb syndrome: Let's ghosts observing you occasionally control your arms and legs. How often depends on the severity

(That or it just makes your limbs behave like how they normally would when given a foreign limb)

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And since you want beneficial pathogens (Much less fun to come up with) different strains of the sunglasses disease that give you other goggle effects