It even says its a disease in ur screenshot what do you mean??
@repitch am i retarded or does it say its a disease in deadmouses screenshot too?
Disease is a dispell type a different one from magic
EDIT: https://gyazo.com/cf718f33cc5158edf5454ae538821555
https://wow.gamepedia.com/Dispel_type
Here you go:
https://gyazo.com/35c90df85e4dc5f2d23544ca3ead5110
As a disease, Devouring Plague cannot be dispelled by the usual magic dispelling effects, preventing most classes from removing it. However, effects like [Divine Shield] and [ice Block] will still remove it.