TheGenerator says:
... I think it would be cool to have some kind of effect on Albert. ...
A large part of this discussion is how long you want this to be part of the story.
• Is it something permanent?
• Do we want to spend the next scene tracking down the bear and finding a way to 'fix it'?
This will dictate how much effort we put into coming up with a solution that is balanced and feasible in the long-term, vs. just going with something cool for a brief time.
TheGenerator says:
... not sure how fun that would be to play. ...
That is the important part. the time we will spend with it heavily affects what will be 'fun'.
TheGenerator says:
... stats changes are boring to me. ...
Agreed.
TheGenerator says:
...
Lille and
Albert might now be able to exchange ideas in wild speak. ...
That could be an interesting ancillary benefit, you would not have the Wild Speak Ability (so no toe-stepping:) but this would be purely a bond between these two.
TheGenerator says:
... I'm thinking there could be both negative and positive things. ...
Someone said 'werebear'. Something like that could be a positive/negative?
Let's not think of this a a punishment, though. It stems from good roleplay and choices made, so I would be inclined to treat it like a new Special Ability (modular-leveling).
Again, though, our group choice of whether we want to pursue this would affect how we rule it. If we want to play out the bear hunt... (or is it a body hunt? In bear form?)... maybe the positive/negative balance of the new 'ability' would depend on how that goes?
If
Albert ends up in the bears body, and does not remember Raynor, then Cure and Turn don't feel right anymore, and we can roll up a whole new character? Characters are easy to make, so this is no big deal, even if it is only for a brief time. But if this does not interest you all, then we can have you return to your original bodies.
TheGenerator says:
... What I'd like to add most is a compulsion/vice. ...
That is easy enough. I also trust you to roleplay that without needing any mechanical enforcement. We could talk about it and come up with ways that it might express itself and (as a group) find times for it to come out, you could always propose it as a consequence of a dice roll, you guys are always welcome (expected and invited) to suggest such consequences.