i was thinking about this today, and given its limited growth potential it would fit somewhere in between the werewolf and
spirit, as it is a cheap card. so it should grow faster than spirits (unlimited* small increases in power) but slower than werewolf (a single large increase in power)
so maybe +2|-1 for unupped and +3|-1 upped (and lower the total health of both to 6?) what do you guys think? it will grow slightly faster than spirits but it will be limited as far as how much growth it can do.
* unlimited in terms of how many times you may use the ability, not including quanta cost or possibility of being lobo'd.