Maybe something like "A bite from a wild Wolfgirl causes a party member to transform into a Wolfgirl themself."?
"Awooo! - a shivering, involuntarily shaved tundrawolf woman needs warmth to survive! Offer her the warmth of your body for a night. Warning, her saliva can be transformative... Teaches a recipe that allows party members to transform into anthro tundrawolves.
This will be going up as a prompt in the Patreon polls tonight.