Thaumaturge
Wandering. Not lost. (He/they)
If the player brings a PC who can "afflict", the onus is one the DM to define "affict" before play.
The second I show the DM that I prepared Contagion, he or she should have before or right then explain his adjudication.
Adjudication upon casting should be for improvised actions, crazy stuff, and the things the game never intended to cover.
I game with my adult friends. I DM. I don't pour over their spell lists before we play, because I don't take the time. I generally trust them. My adult friends. I don't know what the crap they have prepared until they cast it, so I don't have my adjudications all prepped and ready to go.
But I do my best, and we all have a good time anyway.
Somehow.
Thaumaturge.
I also have a hairy beard.